Metallocene compound, catalyst component for olefin polymerization and catalyst for olefin polymerization containing the same, and method for producing olefin polymer using catalyst for olefin polymerization

ABSTRACT

(the numerals and signs in the general formula (1) are as described in the description).

TECHNICAL FIELD

The present invention relates to a metallocene compound, a catalystcomponent for olefin polymerization and a catalyst for olefinpolymerization containing the same, and a method for producing an olefinpolymer using the catalyst for olefin polymerization. More specifically,the invention relates to a metallocene compound having an arylsubstituent or a heteroaryl substituent at the 3-position ofcyclopentathiophene and having a bridged(cyclopentadiene)-(cyclopentathiophene) as a basic skeleton, a catalystcomponent for olefin polymerization and a catalyst for olefinpolymerization containing the same, and a method for producing an olefinpolymer (particularly, ethylene-based polymer) using the catalyst forolefin polymerization.

BACKGROUND ART

As a method for improving molding processability of a metallocene-basedpolyethylene that is generally poor in molding processability, there areknown a method of blending a high-pressure process low densitypolyethylene into the metallocene-based polyethylene and a method ofintroducing long-chain branches into polyethylene by a polymerizationreaction using a specific metallocene. Since the former requires ablending step, production costs become high. Moreover, the resultingblend is excellent in molding processability but mechanical strengththat is an advantage of the metallocene-based polyethylene decreases. Onthe other hand, there is known a method of using a bridged bisindenylcompound (see, for example, Patent Document 1) or a geometricalconstraint half metallocene (see, for example, Patent Document 2) as thelatter specific metallocene for introducing the long-chain branches.

Furthermore, Patent Document 3 reports that, when homopolymerization ofethylene is performed by solution polymerization using an asymmetricmetallocene, in which a cyclopentadienyl group and an indenyl group werebridged with carbon, and methylaluminoxane, it is possible to produce apolyethylene having branches.

In addition, Patent Document 4 reports a catalyst system for producingan ethylene polymer and an ethylene/butene copolymer that are eachuseful as a macromonomer, using, among asymmetric metallocenes in whicha cyclopentadienyl group and an indenyl group were bridged with silicon,a metallocene having methyl groups at the 2, 4, and 7 positions of theindenyl group and a modified clay compound.

Furthermore, the present inventors have proposed in Patent Document 5,among asymmetric metallocenes in which a cyclopentadienyl group and anindenyl group were bridged with a bridging group, a supported catalystfor olefin polymerization containing, as an essential component, aspecific asymmetric metallocene having no substituent other than thebridging group on the cyclopentadienyl group and having hydrogen or aspecific substituent at the 3 position of the indenyl group and further,a method for producing an ethylene-based polymer having improved moldingprocessability using the supported catalyst for olefin polymerization.

BACKGROUND ART DOCUMENTS Patent Documents

-   Patent Document 1: JP-A-08-048711-   Patent Document 2: JP-A-07-500622-   Patent Document 3: JP-A-05-043619-   Patent Document 4: JP-A-2008-050278-   Patent Document 5: JP-A-2011-137146

SUMMARY OF THE INVENTION Problems that the Invention is to Solve

However, according to Patent Documents 1 and 2, the number of terminaldouble bonds and long-chain branches of the resulted polymer are smalland thus an effect of improving the molding processability is not yetsufficient.

According to Patent Document 3, the length of the branch is described tobe a carbon number of 1 to 20 and the length of the branch is too shortfor exhibiting an effect of improving the molding processability aslong-chain branches.

According to Patent Document 4, the number of the terminal double bondsof the polymer is small and there is no description of the formation oflong-chain branches by the catalyst alone.

Moreover, according to Patent Document 5, since an ethylene-basedpolymer having a large degree of strain hardening of elongationviscosity is obtained, an improvement in molding processability isobserved as compared with a conventional long-chain type polyethylenebut the branching index of the long-chain branches does not yet reachthat of the high-pressure process low density polyethylene, so that afurther improvement of the long-chain branch structure has beenrequired.

Under such circumstances, in order to improve the molding processabilityof the metallocene-based polyethylene, it is required to develop amethod for producing a metallocene-based polyethylene having sufficientnumber and length of long-chain branches introduced therein early.

Considering the problems in the above-described conventional techniques,in order to improve the molding processability of the metallocene-basedpolyethylene, an object of the present invention is to provide ametallocene compound capable of producing an ethylene-based polymerhaving sufficient number and length of long-chain branches introducedtherein, a catalyst component for olefin polymerization and a catalystfor olefin polymerization containing the same, and further a method forproducing an olefin polymer (particularly, an ethylene-based polymer)using the catalyst for olefin polymerization.

Incidentally, in the present invention, the polyethylene is a genericname of an ethylene homopolymer and a copolymer of ethylene and anolefin to be mentioned later, and can be paraphrased as anethylene-based polymer.

Means for Solving the Problems

As a result of extensive studies to solve the above-described problems,the present inventors have found that, when a novel metallocene compoundhaving an aryl substituent or a heteroaryl substituent at the 3-positionof cyclopentathiophene and having a bridged(cyclopentadiene)-(cyclopentathiophene) as a basic skeleton is used as acatalyst component for olefin polymerization and a catalyst compositionobtained by combining the metallocene compound with a compound reactingwith it to form a cationic metallocene compound and a fine particlecarrier is used, a metallocene-based polyethylene having sufficientnumber and length of long-chain branches can be produced. Based on thesefindings, they have accomplished the present invention.

That is, the present invention provides:

-   [1] A metallocene compound represented by the following general    formula (1):

-   wherein M¹ represents any transition metal of Ti, Zr, and Hf; X¹ and    X² represent each independently a hydrogen atom, a halogen, a    hydrocarbon group having a carbon number of 1 to 20, an oxygen- or    nitrogen-containing hydrocarbon group having a carbon number of 1 to    20, an amino group substituted with a hydrocarbon group having a    carbon number of 1 to 20, or an alkoxy group having a carbon number    of 1 to 20; Q¹ and Q² represent each independently a carbon atom, a    silicon atom, or a germanium atom; R¹, R², R³, and R⁴ represent each    independently a hydrogen atom or a hydrocarbon group having a carbon    number of 1 to 10, and may form a ring together with at least one of    Q¹ and Q² bonded thereto; m is 0 or 1 and, in the case of m is 0, Q¹    is directly bonded to a conjugated 5-membered ring containing R⁹ and    R¹⁰; R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹² represent each independently a    hydrogen atom, a halogen, a hydrocarbon group having a carbon number    of 1 to 20, a silicon-containing hydrocarbon group having a carbon    number of 1 to 18, which contains a silicon number of 1 to 6, a    halogen-containing hydrocarbon group having a carbon number of 1 to    20, an oxygen-containing hydrocarbon group having a carbon number of    1 to 20, or a silyl group substituted with a hydrocarbon group    having a carbon number of 1 to 20; and R¹¹ represents a substituted    or unsubstituted aryl group represented by the following general    formula (1-a):

-   wherein Y¹ represents an atom of Group 14, 15, or 16 of the Periodic    Table; R¹³, R¹⁴, R¹⁵, R¹⁶, and R¹⁷ represent each independently a    hydrogen atom, a halogen atom, a hydrocarbon group having a carbon    number of 1 to 20, an oxygen- or nitrogen-containing hydrocarbon    group having a carbon number of 1 to 20, an amino group substituted    with a hydrocarbon group having a carbon number of 1 to 20, an    alkoxy group having a carbon number of 1 to 20, a silicon-containing    hydrocarbon group having a carbon number of 1 to 18, which contains    a silicon number of 1 to 6, a halogen-containing hydrocarbon group    having a carbon number of 1 to 20, or a silyl croup substituted with    a hydrocarbon group having a carbon number of 1 to 20, and adjacent    substituents of R¹³, R¹⁴, R¹⁵, R¹⁶, and R¹⁷ may form a ring together    with atoms bonded thereto; n is 0 or 1 and, in case of n is 0, the    substituent R¹³ is not present on Y¹; p is 0 or 1 and, in case of p    is 0, the substituent R¹⁶ and the carbon atom to which R¹⁶ is bonded    are not present and the carbon atom to which R¹⁵ is bonded and the    carbon atom to which R¹⁷ is bonded are directly bonded.-   [2] A metallocene compound represented by the following general    formula (2);

-   wherein M¹ represents any transition metal of Ti, Zr, and Hf; X¹ and    X² represent each independently a hydrogen atom, a halogen, a    hydrocarbon group having a carbon number of 1 to 20, an oxygen- or    nitrogen-containing hydrocarbon group having a carbon number of 1 to    20, an amino group substituted with a hydrocarbon group having a    carbon number of 1 to 20, or an alkoxy group having a carbon number    of 1 to 20; Q¹ represents a carbon atom, a silicon atom, or a    germanium atom; R¹ and R² represent each independently a hydrogen    atom or a hydrocarbon group having a carbon number of 1 to 10, and    may form a ring together with Q¹ bonded thereto; R⁵, R⁶, R⁷, R⁸, R⁹,    R¹⁰, and R¹² represent each independently a hydrogen atom, a    halogen, a hydrocarbon group having a carbon number of 1 to 20, a    silicon-containing hydrocarbon group having a carbon number of 1 to    18, which contains a silicon number of 1 to 6, a halogen-containing    hydrocarbon group having a carbon number of 1 to 20, an    oxygen-containing hydrocarbon group having a carbon number of 1 to    20, or a silyl group substituted with a hydrocarbon group having a    carbon number of 1 to 20; R¹⁸, R¹⁹, R²⁰, R²¹, and R²² represent each    independently a hydrogen atom, a halogen atom, a hydrocarbon group    having a carbon number of 1 to 20, an oxygen- or nitrogen-containing    hydrocarbon group having a carbon number of 1 to 20, an amino group    substituted with a hydrocarbon group having a carbon number of 1 to    20, an alkoxy group having a carbon number of 1 to 20, a    silicon-containing hydrocarbon group having a carbon number of 1 to    18, which contains a silicon number of 1 to 6, a halogen-containing    hydrocarbon group having a carbon number of 1 to 20, or a silyl    group substituted with a hydrocarbon group having a carbon number of    1 to 20, and adjacent substituents of R¹⁸, R¹⁹, R²⁰, R²¹, and R²²    may form a ring together with atoms bonded thereto,-   [3] A metallocene compound represented by the following general    formula (3):

-   wherein M¹ represents any transition metal of Ti, Zr, and Hf; X¹ and    X² represent each independently a hydrogen atom, a halogen, a    hydrocarbon group having a carbon number of 1 to 20, an oxygen- or    nitrogen-containing hydrocarbon group having a carbon number of 1 to    20, an amino group substituted with a hydrocarbon group having a    carbon number of 1 to 20, or an alkoxy group having a carbon number    of 1 to 20; Q¹ represents a carbon atom, a silicon atom, or a    germanium atom; R¹ and R² represent each independently a hydrogen    atom or a hydrocarbon group having a carbon number of 1 to 10, and    may form a ring together with Q¹ bonded thereto; R⁵, R⁶, R⁷, R⁸, R⁹,    R¹⁰, and R¹² represent each independently a hydrogen atom, a    halogen, a hydrocarbon group having a carbon number of 1 to 20, a    silicon-containing hydrocarbon group having a carbon number of 1 to    18, which contains a silicon number of 1 to 6, a halogen-containing    hydrocarbon group having a carbon number of 1 to 20, an    oxygen-containing hydrocarbon group having a carbon number of 1 to    20, or a silyl group substituted with a hydrocarbon group having a    carbon number of 1 to 20; Z′ represents an oxygen atom or a sulfur    atom; R²³, R²⁴, and R²⁵ represent each independently a hydrogen    atom, a halogen, a hydrocarbon group having a carbon number of 1 to    20, a silicon-containing hydrocarbon group having a carbon number of    1 to 18, which contains a silicon number of 1 to 6, a    halogen-containing hydrocarbon group having a carbon number of 1 to    20, an oxygen-containing hydrocarbon group having a carbon number of    1 to 20, or a silyl group substituted with a hydrocarbon group    having a carbon number of 1 to 20, and adjacent substituents of R²³,    R²⁴, and R²⁵ may form a ring together with carbon atoms bonded    thereto.-   [4] The metallocene compound according to any one of the [1] to [3],    wherein Q¹ is a silicon atom in the above general formula (1), (2),    or (3).-   [5] The metallocene compound according to any one of the [1] to [4],    wherein R⁹ is a hydrogen atom in the above general formula (1), (2),    or (3),-   [6] The metallocene compound according to any one of the [1] to [5],    wherein M¹ is zirconium or hafnium in the above general formula (1),    (2), or (3).-   [7] The metallocene compound according to any one of the [1] to [6],    wherein M¹ is zirconium in the above general formula (1), (2), or    (3).-   [8] A catalyst component for olefin polymerization, comprising the    metallocene compound according to any one of the [1] to [7].-   [9] A catalyst for olefin polymerization, comprising the metallocene    compound according to any one of the [1] to [7].-   [10] A catalyst for olefin polymerization, comprising the following    essential components (A), (B) and (C):

Component (A): the metallocene compound according, to any one of the [1]to [7],

Component (B): a compound reacting with the metallocene compound of thecomponent (A) to form a cationic metallocene compound, and

Component (C): a fine particle carrier.

-   [11] The catalyst for olefin polymerization according to the [10],    wherein the component (B) is an aluminoxane.-   [12] The catalyst for olefin polymerization according to the [10] or    [11], wherein the component (C) is silica.-   [13] The catalyst for olefin polymerization according to any one of    the [10] to [12], which further comprises the following component    (D):

Component (D): an organoaluminum compound.

-   [14] A method for producing an olefin-based polymer, comprising    polymerizing an olefin using the catalyst for olefin polymerization    according to any one of the [9] to [13].-   [15] The method for producing an olefin-based polymer according to    the [14], wherein the olefin contains at least ethylene.-   [16] The method for producing an olefin-based polymer according to    the [15], wherein the olefin-based polymer is an ethylene-based    polymer.

Advantage of the Invention

The metallocene compound of the present invention is a novel metallocenecompound having an aryl substituent or a heteroaryl substituent at the3-position of cyclopentathiophene and having a bridged(cyclopentadiene)-(cyclopentathiophene) as a basic skeleton and canproduce a metallocene-based polyethylene having sufficient number andlength of long-chain branches. Also, by using the metallocene compoundof the present invention as a catalyst component for olefinpolymerization, there can be obtained an olefin-based polymer(particularly, an ethylene-based polymer) having sufficient number andlength of long-chain branches introduced therein and having fartherimproved molding processability.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a drawing explaining a baseline and a section of achromatogram in GPC.

FIG. 2 is a graph showing a relation between a branching index (g′)calculated from GPC-VIS measurement and molecular weight (M).

MODE FOR CARRYING OUT THE INVENTION

The following will describe the metallocene compound of the presentinvention, a catalyst component for olefin polymerization and a catalystfor olefin polymerization containing the same, and a method forproducing an olefin polymer using the catalyst for olefin polymerizationin detail.

1. Metallocene Compound

The metallocene compound of the present invention is characterized inthat a cyclopentadienyl ring and a cyclopentathiophenyl ring representedby the following general formula (1) are bridged and further the3-position (R¹¹) of the cyclopentathiophene ring represents asubstituted or unsubstituted aryl group or heteroaryl group(hereinafter, sometimes referred to as “specific aryl group”).

In the metallocene compound of the present invention, since thecyclopentadienyl ring and the cyclopentathiophenyl ring are bridged anda specific aryl group is present at the 3-position (R¹¹) of thecyclopentathiophene ring, both of the formation of a macromer (terminalvinyl polymer) by β-hydrogen elimination and copolymerization of themacromer can be performed by using the metallocene compound of thepresent invention as a catalyst component for olefin polymerization.Therefore, when a catalyst containing the metallocene compound of thepresent invention is used, sufficient number and length of long-chainbranches are introduced and an olefin-based polymer (particularly, anethylene-based polymer) having further improved molding processabilitycan be obtained.

In the metallocene compound of the present invention, the most importantstructure for forming the long-chain branches is that acyclopentathiophene ring is used as a basic skeleton and a specific arylgroup is present at the 3-position (R¹¹) thereof. Thecyclopentathiophene ring can combine with a metal as a monovalent anionsimilarly to an indene ring. However, there is a difference in structurethat an indene ring is composed of a 5-membered ring structure thatdirectly combines with a metal and a 6-membered ring that is condensedtherewith but a cyclopentathiophene ring is composed of a structure inwhich a sulfur-containing 5-membered ring structure is condensed with a5-membered ring structure that directly combines with a metal.Therefore, it is presumed that a specific aryl group that is substitutedto the 3-position (R¹¹) of the cyclopentathiophene ring may generate adifference in a steric effect in a polymerization reaction from the casewhere the aryl group is substituted to the corresponding position(4-position) on the indene ring. Specifically, in the case of thecyclopentathiophene ring, since the specific aryl group that issubstituted to the 3-position is disposed at a position sterically farfrom the metal as compared with the case of the indene ring, it ispresumed that the β-hydrogen elimination reaction is accelerated andthus the formation of the macromer (terminal vinyl polymer) importantfor the formation of the long-chain branch structure in the polymer isaccelerated.

In the general formula (1), M¹ represents any transition metal of Ti,Zr, and Hf, preferably Zr or Hf, and more preferably Zr.

In the general formula (1), X¹ and X² represent each independently ahydrogen atom, a halogen, a hydrocarbon group having a carbon number of1 to 20, an oxygen- or nitrogen-containing hydrocarbon group having acarbon number of 1 to 20, an amino group substituted with a hydrocarbongroup having a carbon number of 1 to 20, or an alkoxy group having acarbon number of 1 to 20.

The halogen represented by X¹ and X² includes a chlorine atom, a bromineatom, an iodine atom, and the like. The hydrocarbon group having acarbon number of 1 to 20 represented by X¹ and X² includes an alkylgroup, an aryl group, and the like and examples thereof include a methylgroup, an ethyl group, an n-propyl group, an i-propyl group, an n-butylgroup, an i-butyl group, a t-butyl group, an n-pentyl group, a neopentylgroup, a cyclopentyl group, an n-hexyl group, a cyclohexyl group, aphenyl group, a benzyl group, a naphthyl group, and the like.

The oxygen-containing hydrocarbon group having a carbon number of 1 to20 represented by X¹ and X² includes hydrocarbon groups having anether-bond, a carbonyl group, an ester bond, a heteroaryl group, or thelike, and examples thereof include a methoxymethyl group, anethoxymethyl group, an n-propoxymethyl group, an i-propoxymethyl group,an n-butoxymethyl group, an i-butoxymethyl group, a t-butoxymethylgroup, a methoxyethyl group, an ethoxyethyl group, an acetyl group, a1-oxopropyl group, a 1-oxo-n-butyl group, a 2-methyl-1-oxopropyl group,a 2,2-dimethyl-1-oxo-propyl group, a phenylacetyl group, adiphenylacetyl group, a benzoyl group, a 2-methoxyphenyl group, a3-methoxyphenyl group, a 4-methoxyphenyl group, a 2-furyl group, a2-tetrahydrofuryl group, a 2-(5-methyl)furyl group, and the like. Thenitrogen-containing hydrocarbon group having a carbon number of 1 to 20includes hydrocarbon groups having an amino group, an imino group, anitrile group, a pyridyl group, a pyrrole group, an imidazole group, apyrozole group, an indole group, or the like, and examples thereofinclude a dimethylaminomethyl group, a diethylaminomethyl group, adi-i-propylaminomethyl group, a bis(dimethylamino)methyl group, abis(di-i-propylamino)methyl group, a (dimethylamino)(phenyl)methylgroup, a methylimino group, an ethylimino group, a 1-(methylimino)ethylgroup, a 1-(phenylimino)ethyl group, a 1-[(phenylmethyl)imino]ethylgroup, and the like.

Examples of the amino group substituted with a hydrocarbon group havinga carbon number of 1 to 20 represented by X¹ and X² include adimethylamino group, a diethyl amino group, a di-n-propyl amino group, adi-i-propylamino group, a di-n-butylamino group, a di-i-butylaminogroup, a di-t-butylamino group, a diphenylamino group, and the like.

Examples of the alkoxy group having a carbon number of 1 to 20represented by X¹ and X² include a methoxy group, an ethoxy group, ann-propoxy group, an i-propoxy group, an n-butoxy group, an i-butoxygroup, a t-butoxy group, a phenoxy group, and the like.

Preferred X¹ and X² include a halogen, an alkyl group having a carbonnumber of 1 to 4, an alkoxy group having a carbon number of 1 to 6, andan amino group substituted with a hydrocarbon group having a carbonnumber of 1 to 6. Among them, there may be mentioned a chlorine atom, abromine atom, a methyl group, an n-butyl group, an i-butyl group, amethoxy group, an ethoxy group, an i-propoxy group, an n-butoxy group, aphenoxy group, a dimethylamino group, and a di-i-propylamino group. Ofthese, a chlorine atom, a methyl group, and a dimethylamino group areparticularly preferred.

In the general formula (1), Q¹ and Q² represent each independently acarbon atom, a silicon atom, or a germanium atom, preferably a carbonatom or a silicon atom, arid more preferably a silicon atom.

In the general formula (1), R¹, R², R³, and R⁴ represent eachindependently a hydrogen atom or a hydrocarbon group having a carbonnumber of 1 to 10, and may form a ring together with at least one of Q¹and Q² bonded thereto. m is 0 or 1 and, in the case of m is 0, Q¹ isdirectly bonded to a conjugated 5-membered ring containing R⁹ and R¹⁰.

The hydrocarbon group having a carbon number of 1 to 10 represented byR¹, R², R³, and R⁴ includes alkyl groups, aryl groups, and the like, andexamples thereof include a methyl group, an ethyl group, an n-propylgroup, an i-propyl group, an n-butyl group, an i-butyl group, a t-butylgroup, an n-pentyl group, a neopentyl group, a cyclopentyl group, ann-hexyl group, a cyclohexyl group, a phenyl group, and the like.

Moreover, as the cases where R¹ and R² form a ring together with Q¹bonded thereto or R³ and R⁴ form a ring together with Q² bonded thereto,there may be mentioned a cyclobutylidene group, a cyclopentylidenegroup, a cyclohexylidene group, a silacyclobutyl group, asilacyclopentyl group, a silacyclohexyl group, and the like.Furthermore, as the case where R¹, R², R³, and R⁴ form a ring togetherwith Q¹ and Q² bonded thereto, a cyclohexylene group and the like may bementioned.

Preferred R¹, R², R³, and R⁴ include a hydrogen atom, a methyl group, anethyl group, a phenyl group, an ethylene group, and a cyclobutylidenegroup in the case where Q¹ and/or Q² are a carbon atom, and include amethyl group, an ethyl group, a phenyl group, and a silacyclobutyl groupin the case where Q¹ and/or Q² are a silicon atom.

In the general formula (1), R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹² representeach independently a hydrogen atom, a halogen, a hydrocarbon grouphaving a carbon number of 1 to 20, a silicon-containing hydrocarbongroup having a carbon number of 1 to 18, which contains a silicon numberof 1 to 6, a halogen-containing hydrocarbon group having a carbon numberof 1 to 20, an oxygen-containing hydrocarbon group having a carbonnumber of 1 to 20, or a silyl group substituted with a hydrocarbon grouphaving a carbon number of 1 to 20.

In the general formula (1), when at least one of R⁵, R⁶, R⁷, and R⁸ hasa substituent as in the ease of a halogen, a hydrocarbon group having acarbon number of 1 to 20, a silicon-containing hydrocarbon group havinga carbon number of 1 to 18, which contains a silicon number of 1 to 6, ahalogen-containing hydrocarbon group having a carbon number of 1 to 20,an oxygen-containing hydrocarbon group having a carbon number of 1 to20, or a silyl group substituted with a hydrocarbon group having acarbon number of 1 to 20, polymerization activity is particularlyenhanced, so that the case is preferred. The number of theabove-described substituents different from a hydrogen atom, which arecontained in R⁵, R⁶, R⁷, and R⁸, may be any of 1 or more and 4 or lessbut is preferably 2 or more and 4 or less.

As specific examples of the substituents other than a hydrogen atom,which are represented by each of R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹², withregard to the halogen, the hydrocarbon group having a carbon number of 1to 20, or the oxygen-containing hydrocarbon group having a carbon numberof 1 to 20, there may be mentioned those the same as the groupsrepresented in the description of the aforementioned X¹ and X².

Examples of the silicon-containing hydrocarbon group having a carbonnumber of 1 to 18, which contains a silicon number of 1 to 6, include abis(trimethylsilyl)methyl group, a bis(t-butyldimethylsilyl)methylgroup, and the like, and examples of the halogen-containing hydrocarbongroup having a carbon number of 1 to 20 include a bromomethyl group, achloromethyl group, a trifluoromethyl group, a 2-chloroethyl group, a2-bromoethyl group, a 2-bromopropyl group, a 3-bromopropyl group, a2-bromocyclopropyl group, a 2,3-dibromocyclopentyl group, a2-bromo-3-iodocyclopentyl group, a 2,3-dibromocyclohexyl group, a2-chloro-3-iodocyclohexyl group, a 2-chlorophenyl group, a4-chlorophenyl group, a 2,3,4,5,6-pentafluorophenyl group, a4-trifluoromethylphenyl group, and the like.

Moreover, the silyl group substituted with a hydrocarbon group having acarbon number of 1 to 20 includes trialkylsilyl groups,dialkylmonoarylsilyl groups, monoalkyldiarylsilyl groups, triarylsilylgroups, and the like, and examples thereof include a trimethylsilylgroup, a tri-t-butylsilyl group, a di-t-butylmethylsilyl group, at-butyldimethylsilyl group, a triphenylsilyl group, adiphenylmethylsilyl group, a phenyldimethylsilyl group, and the like.

Preferred R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹² are a hydrogen atom, ahydrocarbon group having a carbon number of 1 to 20, or a silyl groupsubstituted with a hydrocarbon group having a carbon number of 1 to 20,more preferred is a hydrogen atom, a hydrocarbon group having a carbonnumber of 1 to 10, or a silyl group substituted with a hydrocarbon grouphaving a carbon number of 1 to 18, and still further preferred is ahydrogen atom, a hydrocarbon group having a carbon number of 1 to 6, ora silyl group substituted with a hydrocarbon group having a carbonnumber of 1 to 6.

Examples of the hydrocarbon group having a carbon number of 1 to 10include alkyl groups having a carbon number of 1 to 10, phenyl groupswhich may substituted with an alkyl group having a carbon number of 6 to10, and a naphthyl group. Preferred examples of the silyl groupsubstituted with a hydrocarbon group having a carbon number of 1 to 18include a trimethylsilyl group, an ethyldimethylsilyl group, ann-propyldimethylsilyl group, an i-propyldimethylsilyl group, ann-butyldimethylsilyl group, an i-butyldimethylsilyl group, at-butyldimethylsilyl group, a triethylsilyl group, a t-butyldiethylsilylgroup, a tri-i-propylsilyl group, a dimethylphenylsilyl group, amethyldiphenylsilyl group, and a t-butyldiphenylsilyl group.

Moreover, preferred examples of the hydrocarbon group having a carbonnumber of 1 to 6 include alkyl groups having a carbon number of 1 to 6,and preferred examples of the alkyl group having a carbon number of 1 to6 include a methyl group, an ethyl group, an n-propyl group, an i-propylgroup, an n-butyl group, an i-butyl group, a t-butyl group, an n-pentylgroup, a neopentyl group, a cyclopentyl group, an n-hexyl group, and acyclohexyl group.

Particularly preferred R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹² are a hydrogenatom, an alkyl group having a carbon number of 1 to 6, or a silyl groupsubstituted with a hydrocarbon group having a carbon number of 1 to 6.As the substituents other than the hydrogen atom, more preferred is amethyl group, an ethyl group, an n-propyl group, an i-propyl group, ann-butyl group, an i-butyl group, a t-butyl group, a trimethylsilylgroup, a triethylsilyl group, or a t-butyldimethylsilyl group, andfurther preferred is a methyl group, a t-butyl group, or atrimethylsilyl group.

The substituent R¹¹ represents a substituted or unsubstituted aryl grouphaving a structure represented by the above general formula (1-a). Y¹ inthe general formula (1-a) is preferably any of a carbon atom, a nitrogenatom, an oxygen atom, and a sulfur atom and further preferably any of acarbon atom, an oxygen atom, and a sulfur atom. Preferred unsubstitutedaryl group having the structure represented by the above general formula(1-a) includes a phenyl group, a furyl group, a thienyl group, and thelike.

In the general formula (1-a), R¹³, R¹⁴, R¹⁵, R¹⁶, and R¹⁷ represent eachindependently a hydrogen atom, a halogen atom, a hydrocarbon grouphaving a carbon number of 1 to 20, an oxygen- or nitrogen-containinghydrocarbon group having a carbon number of 1 to 20, an amino groupsubstituted with a hydrocarbon group having a carbon number of 1 to 20,an alkoxy group having a carbon number of 1 to 20, a silicon-containinghydrocarbon group having a carbon number of 1 to 13, which contains asilicon number of 1 to 6, a halogen-containing hydrocarbon group havinga carbon number of 1 to 20, or a silyl group substituted with ahydrocarbon group having a carbon number of 1 to 20, and adjacentsubstituents of R¹³, R¹⁴, R¹⁵, R¹⁶, and R¹⁷ may form one or more ringstogether with atoms bonded thereto.

As specific examples of the substituents other than a hydrogen atom,which are represented by each of R¹³, R¹⁴, R¹⁵, R¹⁶, and R¹⁷, there maybe mentioned those the same as the groups shown in the description ofthe aforementioned X¹ and X² and R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹².

The substituted or unsubstituted aryl group having a structurerepresented by the above general formula (1-a) in the substituent R¹¹specifically includes a phenyl group, a 4-methylphenyl group, a4-i-propylphenyl group, a 4-t-butylphenyl group, a 4-biphenyl group, a2,6-dimethylphenyl group, a 2,5-dimethylphenyl group, a3,5-dimethylphenyl group, a 3,5-i-propylphenyl group, a3,5-t-butylphenyl group, a 2,4,6-trimethylphenyl group, a2,3,5,6-tetramethylphenyl group, a 2,3,4,5,6-pentamethylphenyl group, a4-trimethylsilylphenyl group, a 4-(t-butyldimethylsilyl)phenyl group,3,5-bistrimethylsilylphenyl group, a 4-fluorophenyl group, a4-chlorophenyl group, a 4-bromophenyl group, a 4-trifluoromethylphenylgroup, a 3,5-difluorophenyl group, a 3,5-dichlorophenyl group, a2,4,6-trifluorophenyl group, a 3,4,5-trifluorophenyl group, a2,4,6-trichlorophenyl group, a 2,3,5,6-tetrafluorophenyl group,2,3,4,5,6-pentafluorophenyl group, a 4-methoxyphenyl group, a4-ethoxyphenyl group, a 4-isopropoxyphenyl group, a 4-n-butoxyphenylgroup, a 4-phenoxyphenyl group, a 3,5-dimethoxyphenyl group, a 2-furylgroup, a 2-(5-methyl)furyl group, a 2-(5-n-propyl)furyl group, a2-(5-i-propyl)furyl group, a 2-(5-n-butyl)furyl group, a2-(5-i-butyl)furyl group, a 2-(5-t-butyl)furyl group, a2-(5-trimethylsilyl)furyl group, a 2-(5-triethylsilyl)furyl group, a2-(5-phenyl)furyl group, a 2-(5-tolyl)furyl group, a2-(5-fluorophenyl)furyl group, a 2-(5-chlorophenyl)furyl group, a2-(4,5-dimethyl)furyl group, a 2-benzofuryl group, a 2-thienyl group, a2-(5-methyl)thienyl group, a 2-(5-t-butyl)thienyl group, a2-(5-trimethylsilyl)thienyl group, a 2-(4,5-dimethyl)thienyl group, andthe like.

Moreover, adjacent substituents of R¹³, R¹⁴, R¹⁵, R¹⁶, and R¹⁷ may formone or more aromatic ring or aliphatic rings together with atoms bondedthereto.

Preferred examples of the aromatic ring or aliphatic ring to be formedinclude a 1-naphthyl group, a 2-naphthyl group, a 1-anthryl group, a2-anthryl group, a 9-anthryl group, a 1-phenanthryl group, a2-phenanthryl group, a 3-phenanthryl group, a 4-phenanthryl group, a9-phenanthryl group, a 5-1,2,3,4-tetrahydronaphthyl group, a6-1,2,3,4-tetrahydronaphthyl group, and a9-1,2,3,4,5,6,7,8-octahydroanthryl group. Of these, a 1-naphthyl group,a 2-naphthyl group, and a 9-anthryl group are more preferred, and a1-naphthyl group and a 2-naphthyl group are further preferred.

In addition, in the general formula (1), m is 0 or 1 and, in the case ofm is 0, Q¹ is directly bonded to a conjugated 5-membered ring containingR⁹ and R¹⁰.

The metallocene compound of the present invention is preferably onerepresented by the following general formula (2).

In the metallocene compound represented by the above general formula(2), as M¹, X¹, X², Q¹, R¹, R², R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹²,structures the same as the atoms and groups represented in thedescription of the metallocene compound represented by theaforementioned general formula (1) can be selected. Moreover, as R¹⁸,R¹⁹, R²⁰, R²¹, and R²², structures the same as the atoms and groups ofR¹³, R¹⁴, R¹⁵, R¹⁶, and R¹⁷ represented in the description of themetallocene compound represented by the aforementioned general formula(1) can be selected.

In addition, the metallocene compound of the present invention ispreferably one represented by the following general formula (3) similarto the above general formula (2).

TABLE 7 Results Activity MFR g′ Yield (g-PE/ (g/ g_(a)′ g_(b)′ Example(g) g-Cat/hr) 10 minutes) FR Mw × 10⁴ Mw/Mn value value 1 23.6 236 0.0518.3 14.6 3.6 0.93 0.67 2 25.2 252 0.35 14.1 10.9 3.7 0.94 0.67

In the metallocene compound represented by the above general formula(3), as M¹, X¹, X², Q¹, R¹, R², R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹²,structures the same as the atoms and groups represented in thedescription of the metallocene compound represented by theaforementioned general formula (1) can be selected. Moreover, as R²³,R²⁴, and R²⁵, structures the same as the atoms and groups of R¹³, R¹⁴,R¹⁵, R¹⁶, and R¹⁷ represented in the description of the metallocenecompound represented by the aforementioned general formula (1) can beselected. Z¹ represents an oxygen atom or a sulfur atom.

As the metallocene compound of the present invention, among thecompounds represented by the above general formula (1), a compoundrepresented by the following general formula (4) may be mentioned as apreferred compound.

TABLE 8 Catalyst Amount of Component (A) Component (B) Component (C)solid Metallocene Amount Amount Amount catalyst Example compound (mmol)Compound (mmol) Compound (g) (g) 3 A 0.00178 MAO 0.36 silica 0.071 0.0934 B 0.00403 MAO 0.81 silica 0.161 0.209 5 C 0.00345 MAO 0.69 silica0.0138 0.179 6 D 0.00119 MAO 0.24 silica 0.048 0.062 7 E 0.00133 MAO0.27 silica 0.053 0.069 8 F 0.00073 MAO 0.15 silica 0.029 0.038 C1 G0.00208 MAO 0.42 silica 0.083 0.108 C2 H 0.00386 MAO 0.77 silica 0.1540.200 Polymerization conditions C2 Polymer- Hydrogen partial ization TFAH2/C2 Temperature pressure Time Example (mmol) Solvent (%) Comonomer (°C.) (MPa) (minute) 3 0.30 isobutane 0.642 C4/10 ml 75 1.4 60 initialcharging 4 0.30 isobutane 0.063 C4/30 ml 75 1.4 60 initial charging 50.30 isobutane 0.075 C4/30 ml 75 1.4 60 initial charging 6 0.30isobutane 0.062 C4/70 ml 75 1.4 60 initial charging 7 0.30 isobutane0.049 C4/70 ml 75 1.4 60 initial charging 8 0.30 isobutane 0.139 C4/70ml 75 1.4 60 initial charging C1 0.30 isobutane 0.633 C4/10 ml 75 1.4 60initial charging C2 0.50 heptane 0.252 C4/C2 = 75 1.4 60 5.0 mol %

In the metallocene compound represented by the above general formula(4), as M¹, X¹, X², Q, R¹, R², R⁹, R¹¹, and R¹², configurations the sameas the atoms and groups represented in the description of themetallocene compound represented by the aforementioned general formula(1) can be selected.

Specific examples of the metallocene compound of the present inventionare shown in the following general formula (1′) and Tables 1 to 5 butare not limited thereto.

Incidentally, in the following Tables, abbreviations are as follows.

-   Me: methyl, Et: ethyl, Pr: propyl, Bu: butyl, Ph: phenyl, Cp:    cyclopentadienyl

TABLE 9 Results Activity MFR g′ Yield (g-PE/ (g/ Mw × g_(a)′ g_(b)′Example (g) g-Cat/hr) 10 minutes) FR 10⁴ Mw/Mn value value 3 108.0 11530.20 23.4 10.7 3.9 0.89 — (0.59) 4 53.3 255 3.55 9.4 9.7 5.1 0.75 0.38 530.4 170 2.11 9.0 9.4 4.5 0.81 0.42 6 40.0 645 0.12 22.0 12.5 4.1 0.820.52 7 5.6 81 0.24 21.5 11.7 4.3 0.76 0.49 8 92.2 2459 0.10 20.8 10.43.4 0.85 0.63 C1 38.0 353 1.87 15.1 6.8 3.7 0.87 — (0.63) C2 17.0 850.54 16.5 10.4 5.1 0.86 — (0.60)

TABLE 1 Number M X¹, X² R¹R²Q R⁹ R⁵R⁶R⁷R⁸Cp R¹⁰ R¹¹ R¹² 1 Zr Cl Me₂Si MeCp H Ph Me 2 Zr Cl Me₂Si Me Cp H 4-Me—Ph Me 3 Zr Cl Me₂Si Me Cp H4-^(i)Pr—Ph Me 4 Zr Cl Me₂Si Me Cp H 4-^(t)Bu—Ph Me 5 Zr Cl Me₂Si Me CpH 4-Ph—Ph Me 6 Zr Cl Me₂Si Me Cp H 4-MeO—Ph Me 7 Zr Cl Me₂Si Me Cp H4-PhO—Ph Me 8 Zr Cl Me₂Si Me Cp H 4-F—Ph Me 9 Zr Cl Me₂Si Me Cp H4-Cl—Ph Me 10 Zr Cl Me₂Si Me Cp H 4-CF₃—Ph Me 11 Zr Cl Me₂Si Me Cp H2,6-Me₂—Ph Me 12 Zr Cl Me₂Si Me Cp H 2,5-Me₂—Ph Me 13 Zr Cl Me₂Si Me CpH 3,5-Me₂—Ph Me 14 Zr Cl Me₂Si Me Cp H 3,5-^(i)Pr₂—Ph Me 15 Zr Cl Me₂SiMe Cp H 3,5-^(t)Bu₂—Ph Me 16 Zr Cl Me₂Si Me Cp H 3,5-(MeO)₂—Ph Me 17 ZrCl Me₂Si Me Cp H 3,5-F₂—Ph Me 18 Zr Cl Me₂Si Me Cp H 3,5-Cl₂—Ph Me 19 ZrCl Me₂Si Me Cp H 2,4,6-Me₃—Ph Me 20 Zr Cl Me₂Si Me Cp H 2,4,6-F₃—Ph Me21 Zr Cl Me₂Si Me Cp H 3,4,5-F₃—Ph Me 22 Zr Cl Me₂Si Me Cp H2,3,5,6-Me₄—Ph Me 23 Zr Cl Me₂Si Me Cp H 2,3,5,6-F₄—Ph Me 24 Zr Cl Me₂SiMe Cp H 2,3,4,5,6-Me₅—Ph Me 25 Zr Cl Me₂Si Me Cp H 2,3,4,5,6-F₅—Ph Me 26Zr Br Me₂Si Me Cp H Ph Me 27 Zr Me Me₂Si Me Cp H Ph Me 28 Zr NMe₂ Me₂SiMe Cp H Ph Me 29 Zr OCH₃ Me₂Si Me Cp H Ph Me 30 Zr OEt Me₂Si Me Cp H PhMe 31 Zr O^(t)Bu Me₂Si Me Cp H Ph Me 32 Zr OPh Me₂Si Me Cp H Ph Me 33 ZrCl Me₂Si Et Cp H Ph Me 34 Zr Cl Me₂Si ^(n)Pr Cp H Ph Me 35 Zr Cl Me₂Si^(i)Pr Cp H Ph Me 36 Zr Cl Me₂Si ^(n)Bu Cp H Ph Me 37 Zr Cl Me₂Si ^(i)BuCp H Ph Me 38 Zr Cl Me₂Si ^(t)Bu Cp H Ph Me 39 Zr Cl Me₂Si Ph Cp H Ph Me40 Zr Cl Me₂Si 1-naphthyl Cp H Ph Me

TABLE 2 Number M X¹, X² R¹R²Q R⁹ R⁵R⁶R⁷R⁸Cp R¹⁰ R¹¹ R¹² 41 Zr Cl Me₂Sitrimethyl- Cp H Ph Me silyl 42 Zr Cl Et₂Si Me Cp H Ph Me 43 Zr Cl Ph₂SiMe Cp H Ph Me 44 Zr Cl Silacyclo- Me Cp H Ph Me butylene 45 Zr Cl Me₂SiMe Cp H 2-furyl Me 46 Zr Cl Me₂Si Me Cp H 5-Me-2-furyl Me 47 Zr Cl Me₂SiMe Cp H 5-^(n)Pr-2-furyl Me 48 Zr Cl Me₂Si Me Cp H 5-^(i)Pr-2-furyl Me49 Zr Cl Me₂Si Me Cp H 5-^(n)Bu-2-furyl Me 50 Zr Cl Me₂Si Me Cp H5-^(i)Bu-2-furyl Me 51 Zr Cl Me₂Si Me Cp H 5-^(t)Bu-2-furyl Me 52 Zr ClMe₂Si Me Cp H 5-trimethylsilyl-2-furyl Me 53 Zr Cl Me₂Si Me Cp H5-triethylsilyl-2-furyl Me 54 Zr Cl Me₂Si Me Cp H 5-Ph-2-furyl Me 55 ZrCl Me₂Si Me Cp H 5-tolyl-2-furyl Me 56 Zr Cl Me₂Si Me Cp H5-fluorophenyl-2-furyl Me 57 Zr Cl Me₂Si Me Cp H 5-chlorophenyl-2-furylMe 58 Zr Cl Me₂Si Me Cp H 4,5-Me₂-2-furyl Me 59 Zr Cl Me₂Si Me Cp H2-benzofuryl Me 60 Zr Cl Me₂Si Me Cp H 2-thienyl Me 61 Zr Cl Me₂Si Me CpH 5-Me-2-thienyl Me 62 Zr Cl Me₂Si Me Me₄Cp H Ph Me 63 Zr Cl Me₂Si MeMe₄Cp H 4-Me—Ph Me 64 Zr Cl Me₂Si Me Me₄Cp H 4-^(i)Pr—Ph Me 65 Zr ClMe₂Si Me Me₄Cp H 4-^(t)Bu—Ph Me 66 Zr Cl Me₂Si Me Me₄Cp H 4-Ph—Ph Me 67Zr Cl Me₂Si Me Me₄Cp H 2-furyl Me 68 Zr Cl Me₂Si Me Me₄Cp H 5-Me-2-furylMe 69 Zr Cl Me₂Si Me Me₄Cp H 5-^(t)Bu-2-furyl Me 70 Zr Cl Me₂Si Me Me₄CpH 5-trimethylsilyl-2-furyl Me 71 Zr Cl Me₂Si Me Me₄Cp H 4,5-Me2-2-furylMe 72 Zr Cl Me₂Si Me Me₄Cp H 2-benofuryl Me 73 Zr Cl Me₂Si Me Me₄Cp H2-thienyl Me 74 Zr Cl Me₂Si Me Me₄Cp H 5-Me-2-thienyl Me

TABLE 3 Number M X¹, X² R¹R²Q R⁹ R⁵R⁶R⁷R⁸Cp R¹⁰ R¹¹ R¹² 75 Zr Cl Me₂Si HCp H Ph H 76 Zr Cl Me₂Si H Cp H 4-Me—Ph H 77 Zr Cl Me₂Si H Cp H4-^(i)Pr—Ph H 78 Zr Cl Me₂Si H Cp H 4-^(t)Bu—Ph H 79 Zr Cl Me₂Si H Cp H4-Ph—Ph H 80 Zr Cl Me₂Si H Cp H 4-MeO—Ph H 81 Zr Cl Me₂Si H Cp H4-PhO—Ph H 82 Zr Cl Me₂Si H Cp H 4-F—Ph H 83 Zr Cl Me₂Si H Cp H 4-Cl—PhH 84 Zr Cl Me₂Si H Cp H 4-CF₃—Ph H 85 Zr Cl Me₂Si H Cp H 2,6-Me₂—Ph H 86Zr Cl Me₂Si H Cp H 2,5-Me₂—Ph H 87 Zr Cl Me₂Si H Cp H 3,5-Me₂—Ph H 88 ZrCl Me₂Si H Cp H 3,5-^(i)Pr₂—Ph H 89 Zr Cl Me₂Si H Cp H 3,5-^(t)Bu₂—Ph H90 Zr Cl Me₂Si H Cp H 3,5-(MeO)₂—Ph H 91 Zr Cl Me₂Si H Cp H 3,5-F₂—Ph H92 Zr Cl Me₂Si H Cp H 3,5-Cl₂—Ph H 93 Zr Cl Me₂Si H Cp H 2,4,6-Me₃—Ph H94 Zr Cl Me₂Si H Cp H 2,4,6-F₃—Ph H 95 Zr Cl Me₂Si H Cp H 3,4,5-F₃—Ph H96 Zr Cl Me₂Si H Cp H 2,3,5,6-Me₄—Ph H 97 Zr Cl Me₂Si H Cp H2,3,5,6-F₄—Ph H 98 Zr Cl Me₂Si H Cp H 2,3,4,5,6-Me₅—Ph H 99 Zr Cl Me₂SiH Cp H 2,3,4,5,6-F₅—Ph H 100 Zr Br Me₂Si H Cp H Ph H 101 Zr Me Me₂Si HCp H Ph H 102 Zr NMe₂ Me₂Si H Cp H Ph H 103 Zr OCH₃ Me₂Si H Cp H Ph H104 Zr OEt Me₂Si H Cp H Ph H 105 Zr O^(t)Bu Me₂Si H Cp H Ph H 106 Zr OPhMe₂Si H Cp H Ph H 107 Zr Cl Et₂Si H Cp H Ph H 108 Zr Cl Ph₂Si H Cp H PhH 109 Zr Cl Silacyclo- H Cp H Ph H butylene 110 Zr Cl Me₂Si H Cp H2-furyl H 111 Zr Cl Me₂Si H Cp H 5-Me-2-furyl H 112 Zr Cl Me₂Si H Cp H5-^(n)Pr-2-furyl H 113 Zr Cl Me₂Si H Cp H 5-^(i)Pr-2-furyl H 114 Zr ClMe₂Si H Cp H 5-^(n)Bu-2-furyl H 115 Zr Cl Me₂Si H Cp H 5-^(i)Bu-2-furylH 116 Zr Cl Me₂Si H Cp H 5-^(t)Bu-2-furyl H 117 Zr Cl Me₂Si H Cp H5-trimethylsilyl-2-furyl H 118 Zr Cl Me₂Si H Cp H5-triethylsilyl-2-furyl H 119 Zr Cl Me₂Si H Cp H 5-Ph-2-furyl H 120 ZrCl Me₂Si H Cp H 5-tolyl-2-furyl H

TABLE 4 Number M X¹, X² R¹R²Q R⁹ R⁵R⁶R⁷R⁸Cp R¹⁰ R¹¹ R¹² 121 Zr Cl Me₂SiH Cp H 5-fluorophenyl-2-furyl H 122 Zr Cl Me₂Si H Cp H5-chlorophenyl-2-furyl H 123 Zr Cl Me₂Si H Cp H 4,5-Me₂-2-furyl H 124 ZrCl Me₂Si H Cp H 2-benzofuryl H 125 Zr Cl Me₂Si H Cp H 2-thienyl H 126 ZrCl Me₂Si H Cp H 5-Me-2-thienyl H 127 Zr Cl Me₂Si H Me₄Cp H Ph H 128 ZrCl Me₂Si H Me₄Cp H 4-Me—Ph H 129 Zr Cl Me₂Si H Me₄Cp H 4-^(i)Pr—Ph H 130Zr Cl Me₂Si H Me₄Cp H 4-^(t)Bu—Ph H 131 Zr Cl Me₂Si H Me₄Cp H 4-Ph—Ph H132 Zr Cl Me₂Si H Me₄Cp H 2-furyl H 133 Zr Cl Me₂Si H Me₄Cp H5-Me-2-furyl H 134 Zr Cl Me₂Si H Me₄Cp H 5-^(t)Bu-2-furyl H 135 Zr ClMe₂Si H Me₄Cp H 5-trimethylsilyl-2-furyl H 136 Zr Cl Me₂Si H Me₄Cp H4,5-Me₂-2-furyl H 137 Zr Cl Me₂Si H Me₄Cp H 2-benzofuryl H 138 Zr ClMe₂Si H Me₄Cp H 2-thienyl H 139 Zr Cl Me₂Si H Me₄Cp H 5-Me-2-thienyl H140 Zr Cl Me₂Si H Cp Me Ph H 141 Zr Cl Me₂Si H Cp Me 4-Me—Ph H 142 Zr ClMe₂Si H Cp Me 4-^(i)Pr—Ph H 143 Zr Cl Me₂Si H Cp Me 4-^(t)Bu—Ph H 144 ZrCl Me₂Si H Cp Me 4-Ph—Ph H 145 Zr Cl Me₂Si H Cp Me 4-MeO—Ph H 146 Zr ClMe₂Si H Cp Me 4-PhO—Ph H 147 Zr Cl Me₂Si H Cp Me 4-F—Ph H 148 Zr ClMe₂Si H Cp Me 4-Cl—Ph H 149 Zr Cl Me₂Si H Cp Me 4-CF₃—H 150 Zr Cl Me₂SiH Cp Me 2,6-Me₂—Ph H 151 Zr Cl Me₂Si H Cp Me 2,5-Me₂—Ph H 152 Zr ClMe₂Si H Cp Me 3,5-Me₂—Ph H 153 Zr Cl Me₂Si H Cp Me 3,5-^(i)Pr₂—Ph H 154Zr Cl Me₂Si H Cp Me 3,5-^(t)Bu₂—Ph H 155 Zr Cl Me₂Si H Cp Me3,5-(MeO)₂—Ph H 156 Zr Cl Me₂Si H Cp Me 3,5-F₂—Ph H 157 Zr Cl Me₂Si H CpMe 3,5-Cl₂—Ph H 158 Zr Cl Me₂Si H Cp Me 2,4,6-Me₃—Ph H 159 Zr Cl Me₂Si HCp Me 2,4,6-F₃—Ph H 160 Zr Cl Me₂Si H Cp Me 3,4,5-F₃—Ph H

TABLE 5 Number M X¹, X² R¹R²Q R⁹ R⁵R⁶R⁷R⁸Cp R¹⁰ R¹¹ R¹² 161 Zr Cl Me₂SiH Cp Me 2,3,5,6-Me₄—Ph H 162 Zr Cl Me₂Si H Cp Me 2,3,5,6-F₄—Ph H 163 ZrCl Me₂Si H Cp Me 2,3,4,5,6-Me₅—Ph H 164 Zr Cl Me₂Si H Cp Me2,3,4,5,6-F₅—Ph H 165 Zr Cl Et₂Si H Cp Me Ph H 166 Zr Cl Ph₂Si H Cp MePh H 167 Zr Cl Silacyclo- H Cp Me Ph H butylene 168 Zr Cl Me₂Si H Cp Me2-furyl H 169 Zr Cl Me₂Si H Cp Me 5-Me-2-furyl H 170 Zr Cl Me₂Si H Cp Me5-^(n)Pr-2-furyl H 171 Zr Cl Me₂Si H Cp Me 5-^(i)Pr-2-furyl H 172 Zr ClMe₂Si H Cp Me 5-^(n)Bu-2-furyl H 173 Zr Cl Me₂Si H Cp Me5-^(i)Bu-2-furyl H 174 Zr Cl Me₂Si H Cp Me 5-^(n)Bu-2-furyl H 175 Zr ClMe₂Si H Cp Me 5-trimethylsilyl-2-furyl H 176 Zr Cl Me₂Si H Cp Me5-triethylsilyl-2-furyl H 177 Zr Cl Me₂Si H Cp Me 5-Ph-2-furyl H 178 ZrCl Me₂Si H Cp Me 5-tolyl-2-furyl H 179 Zr Cl Me₂Si H Cp Me5-fluorophenyl-2-furyl H 180 Zr Cl Me₂Si H Cp Me 5-chlorophenyl-2-furylH 181 Zr Cl Me₂Si H Cp Me 4,5-Me₂-2-furyl H 182 Zr Cl Me₂Si H Cp Me2-benzofuryl H 183 Zr Cl Me₂Si H Cp Me 2-thienyl H 184 Zr Cl Me₂Si H CpMe 5-Me-2-thienyl H 185 Zr Cl Me₂Si H Me₄Cp Me Ph H 186 Zr Cl Me₂Si HMe₄Cp Me 4-Me—Ph H 187 Zr Cl Me₂Si H Me₄Cp Me 4-^(i)Pr—Rh H 188 Zr ClMe₂Si H Me₄Cp Me 4-^(t)Bu—Ph H 189 Zr Cl Me₂Si H Me₄Cp Me 4-Ph—Ph H 190Zr Cl Me₂Si H Me₄Cp Me 2-furyl H 191 Zr Cl Me₂Si H Me₄Cp Me 5-Me-2-furylH 192 Zr Cl Me₂Si H Me₄Cp Me 5-^(t)Bu-2-furyl H 193 Zr Cl Me₂Si H Me₄CpMe 5-trimethylsilyl-2-furyl H 194 Zr Cl Me₂Si H Me₄Cp Me 4,5-Me₂-2-furylH 195 Zr Cl Me₂Si H Me₄Cp Me 2-benzofuryl H 196 Zr Cl Me₂Si H Me₄Cp Me2-thienyl H 197 Zr Cl Me₂Si H Me₄Cp Me 5-Me-2-thienyl H

Moreover, there may be mentioned compounds in which zirconium of theabove-described compounds is replaced by titanium or hafnium, and thelike, as preferred ones.

2. Synthetic Method of Metallocene Compounds

The metallocene compound of the present invention can be synthesized byany methods depending on the substituents or bonding modes. An exampleof representative synthetic routes is shown below.

In the above synthetic route, 2 is obtained by subjecting 1 andphenylmagnesium bromide to a coupling reaction in the presence of anickel catalyst. After 2 is reacted with methacrylic acid, the resulting3 is reduced with lithium aluminum hydride and further dehydration isperformed using p-toluenesulfonic acid to obtain ahydrocyclopentathiophene 5. After 5 is anionized with one equivalent ofn-butyllithium or the like, the anion is reacted with an excess amountof dimethyldichlorosilane and unreacted dimethyldichlorosilane isremoved by distillation to obtain 6. The resulting 6 is reacted withsodium cyclopentadienylide to obtain 7. After 7 is dianionized with twoequivalents of n-butyllithium or the like, the dianion is reacted withzirconium tetrachloride to obtain 8.

As for the synthesis of the metallocene compound in which a substituentis introduced into the phenyl group at the 3-position of thecyclopentathiophene ring, the synthesis can be achieved by using acorresponding substituted raw material. By using a correspondingGrignard reagent such as 4-methylphenylmagnesium bromide,4-i-propylphenylmagnesium bromide, or 4-t-butylphenylmagnesium bromideinstead of phenylmagnesium bromide, a corresponding substituent can beintroduced at the 3-position of the cyclopentathiophene ring.

Moreover, by using a corresponding reagent, for example,diethyldichlorosilane, diphenyldichlorosilane, or the like, instead ofdimethyldichlorosilane to be reacted with 5, a corresponding bridginggroup structure can be introduced.

Furthermore, by using an anion of a corresponding substitutedcyclopentadiene, for example, an anion of t-butylcyclopentadiene,1,3-dimethylcyclopentadiene, 1-methyl-3-t-butylcyclopentadiene, or thelike, instead of cyclopentadienyl, a complex in which a correspondingsubstituent is introduced into cyclopentadiene can be synthesized.

In addition, as for the synthesis of the metallocene compound in whicheach of various substituents is introduced at the 4-position of thecyclopentathiophene ring, 5 in which each of the various substituents isintroduced at the 4-position of the cyclopentathiophene ring can besynthesized by reacting 3 with a Grignard reagent or an organolithiumreagent that corresponds to each of the various substituents, instead oflithium aluminum hydride, and performing the dehydration reaction withp-toluenesulfonic acid.

3. Catalyst for Olefin Polymerization

(1) individual Components

The metallocene compound of the present invention forms a catalystcomponent for olefin polymerization and the catalyst component can beused for a catalyst for olefin polymerization.

The catalyst for olefin polymerization of the present invention cancontain known components in addition to the aforementioned metallocenecompound of the present invention but preferably contains the followingcomponents (A), (B), and (C).

Component (A): the metallocene compound of the present invention

Component (B): a compound reacting with the metallocene compound of thecomponent (A) to form a cationic metallocene compound, and

Component (C): a fine particle carrier.

(2) Component (A)

The catalyst for olefin polymerization of the present invention uses themetallocene compound represented by any of the aforementioned generalformulae (1) to (3) as an essential component (A), and it is alsopossible to use one or two or more compounds thereof.

(3) Component (B)

The catalyst for olefin polymerization of the present inventionpreferably contains, as a component (B), a compound reacting with themetallocene compound of the component (A) to form a cationic metallocenecompound, in addition to the above component (A).

The component (B) is not particularly limited as long as it is acompound reacting with the component (A) to form a cationic metallocenecompound, and known components may be used but there may be, forexample, mentioned organoaluminum oxy compounds and borane compounds,borate compounds, and the like.

When an organoaluminum oxy compound is used as the component (B), thedegree of strain hardening (λmax) of the resulting ethylene-basedpolymer becomes large and/or Mz/Mw (where Mz represents Z-averagemolecular weight measured by GPC and Mw represents weight-averagemolecular weight measured by GPC) that is a measure of the content ofhigh-molecular-weight components increases, and thus the processabilityis more improved, so that the use is preferred.

When a borane compound or a borate compound is used as the component(B), the polymerization activity and copolymerizability become high, sothat the productivity of the ethylene-based polymer having long-chainbranches is improved.

Moreover, as the component (B), it is also possible to use a mixture ofthe above organoaluminum oxy compound and the above borane compound orborate compound. Furthermore, the borane compound and borate compoundmay be also used in combinations of two or more thereof.

The following will describe these individual compounds in furtherdetail.

(i) Organoaluminum Oxy Compound

The organoaluminuin oxy compound has an Al—O—Al bond in the molecule,and the number of the bonds is in the range of usually 1 to 100,preferably 1 to 50. Such an organoaluminum oxy compound is usually aproduct obtained by reacting an organoaluminum compound with water.

Of the organoaluminum oxy compounds, one obtained by reacting analkylaluminum with water is usually referred to as an aluminoxane andcan be suitably used as the component (B). Also, of the aluminoxanes,methylaluminoxane (including those essentially composed ofmethylaluminoxane (MAO)) is particularly suitable as the organoaluminumoxy compound.

Incidentally, as the organoaluminum oxy compound, two or more of theorganoaluminum oxy compounds can also be used in combination, and asolution of the organoaluminum oxy compound dissolved or dispersed in aninert hydrocarbon solvent to be mentioned below may be used.

The reaction of the organoaluminum with water is usually carried out inan inert hydrocarbon (solvent). As the inert hydrocarbon, there can beused aliphatic hydrocarbons, alicyclic hydrocarbons, and aromatichydrocarbons such as pentane, hexane, heptane, cyclohexane,methylcyclohexane, benzene, toluene, and xylene, but it is preferable touse an aliphatic hydrocarbon or an aromatic hydrocarbon.

As the organoaluminum compound to be used for preparing theorganoaluminum oxy compound, any of compounds represented by thefollowing general formula (I) can be used but preferably, atrialkylaluminum is used.

R^(a) _(t)AlX^(a) _(3-t)   (I)

wherein R^(a) represents a hydrocarbon group having a carbon number of 1to 18, preferably a carbon number of 1 to 12, such as an alkyl group, analkenyl group, an aryl group, or an aralkyl group, X^(a) represents ahydrogen atom or a halogen atom, and t represents an integer of 1≤t≤3.

Examples of the alkyl group in the trialkylaluminum include a methylgroup, an ethyl group, a propyl group, an isopropyl group, a butylgroup, an isobutyl group, a pentyl group, a hexyl group, an octyl group,a decyl group, a dodecyl group, and the like but, of these, a methylgroup is particularly preferred.

The above organoaluminum compounds may be also used in combinations oftwo or more thereof.

The reaction ratio of water to the organoaluminum compound (molar ratioof water/Al) is preferably 0.25/1 to 1.2/1, particularly preferably0.5/1 to 1/1, and the reaction temperature is usually in the range ofusually −70 to 100° C., preferably −20 to 20° C. The reaction time isselected from the range of usually 5 minutes to 24 hours, preferably 10minutes to 5 hours. As the water required for the reaction, there may beutilized not only simple water but also crystal water contained incopper sulfate hydrate, aluminum sulfate hydrate, or the like and acomponent from which water may be formed in the reaction system.

(ii) Borane Compound

Moreover, examples of the borane compounds to be used as the component(B) include triphenylborane, tri(o-tolyl)borane, tri(p-tolyl)borane,tri(m-tolyl)borane, tri(o-fluorophenyl)borane,tris(p-fluorophenyl)borane, tris(m-fluorophenyl)borane,tris(2,5-difluorophenyl)borane, tris(3,5-difluorophenyl)borane,tris(4-trifluoromethylphenyl)borane,tris(3,5-ditrifluoromethylphenyl)borane,tris(2,6-ditrifluoromethylphenyl)borane, tris(pentafluorophenyl)borane,tris(perfluoronaphthyl)borane, tris(perfluorobiphenyl)borane,tris(perfluoroanthryl)borane, tris(perfluorobinaphthyl)borane, and thelike.

Of these, tris(3,5-ditrifluoromethylphenyl)borane,tris(2,6-ditrifluoromethylphenyl)borane, tris(pentafluorophenyl)borane,tris(perfluoronaphthyl)borane, tris(perfluorobiphenyl)borane,tris(perfluoroanthryl)borane, and tris(perfluorobinaphthyl)borane aremore preferred, and further preferably,tris(2,6-ditrifluoromethylphenyl)borane, tris(pentafluorophenyl)borane,tris(perfluoronaphthyl)borane, and tris(perfluorobiphenyl)borane areexemplified as preferred borane compounds.

(iii) Borate Compounds

Further, when the borate compounds to be used as the component (B) arespecifically expressed, a first example is a compound represented by thefollowing general formula (II).

[L¹-H]⁺[BR^(b)R^(c)X^(b)X^(c)]⁻  (II)

In the formula (II), L¹ is a neutral Lewis base, H is a hydrogen atom,[L¹-H] is a Bronsted acid such as an ammonium, an anilinium, or aphosphonium. As the ammonium, there can be exemplifiedtrialkyl-substituted ammoniums such as trimethylammonium,triethylammonium, tripropylammonium, tributylammonium, andtri(n-butyl)ammonium, and dialkylammoniums such as di(n-propyl)ammoniumand dicyclohexylammonium.

In addition, as the anilinium, there can be exemplifiedN,N-dialkylaniliniums such as N,N-dimethylanilinium,N,N-diethylanilinium, and N,N-2,4,6-pentamethylanilinium. Furthermore,as the phosphonium, there may be mentioned triarylphosphoniums such astriphenylphosphonium, tributylphosphonium, tri(methylphenyl)phosphonium,and tri(dimethylphenyl)phosphonium, and trialkylphosphoniums.

Moreover, in the formula (II), R^(b) and R^(c) are each an aromatic orsubstituted aromatic hydrocarbon group containing 6 to 20, preferably 6to 16 carbon atoms, which are the same or different from each other, andmay be linked to each other with a bridging group. As the substituent ofthe substituted aromatic hydrocarbon group, preferred is an alkyl grouprepresented by a methyl group, an ethyl group, a propyl group, or anisopropyl group, or a halogen atom such as fluorine, chlorine, bromine,or iodine. Furthermore, X^(b) and X^(c) are each independently a hydridegroup, a halide group, a hydrocarbon group containing 1 to 20 carbonatoms, or a substituted hydrocarbon group containing 1 to 20 carbonatoms, one or more hydrogen atoms of which are replaced with a halogenatom.

As specific examples of the compound represented by the above generalformula (II), there can be exemplified tributylammoniumtetra(pentafluorophenyl)borate, tributylammoniumtetra(2,6-ditrifluoromethylphenyl)borate, tributylammoniumtetra(3,5-ditrifluoromethylphenyl)borate, tributylammoniumtetra(2,6-difluorophenyl)borate, tributylammoniumtetra(perfluoronaphthyl)borate, dimethylaniliniumtetra(pentafluorophenyl)borate, dimethylaniliniumtetra(2,6-ditrifluoromethylphenyl)borate, dimethylaniliniumtetra(3,5-ditrifluoromethylphenyl)borate, dimethylaniliniumtetra(2,6-difluorophenyl)borate, dimethylaniliniumtetra(perfluoronaphthyl)borate, triphenylphosphoniumtetra(pentafluorophenyl)borate, triphenylphosphoniumtetra(2,6-ditrifluoromethylphenyl)borate, triphenylphosphoniumtetra(3,5-ditrifluoromethylphenyl)borate, triphenylphosphoniumtetra(2,6-difluorophenyl)borate, triphenylphosphoniumtetra(perfluoronaphthyl)borate, trimethylammoniumtetra(2,6-ditrifluoromethylphenyl)borate, triethylammoniumtetra(pentafluorophenyl)borate, triethylammoniumtetra(2,6-ditrifluoromethylphenyl)borate, triethylammoniumtetra(perfluoronaphthyl)borate, tripropylammoniumtetra(pentafluorophenyl)borate, tripropylammoniumtetra(2,6-ditrifluoromethylphenyl)borate, tripropylammoniumtetra(perfluoronaphthyl)borate, di(1-propyl)ammoniumtetra(pentafluorophenyl)borate, dicyclohexylammonium tetraphenylborate,and the like.

Of these, preferred are tributylammonium tetra(pentafluorophenyl)borate,tributylammonium tetra(2,6-ditrifluoromethylphenyl)borate,tributylammonium tetra(3,5-ditrifluoromethylphenyl)borate,tributylammonium tetra(perfluoronaphthyl)borate, dimethylaniliniumtetra(pentafluorophenyl)borate, dimethylaniliniumtetra(2,6-ditrifluoromethylphenyl)borate, dimethylaniliniumtetra(3,5-ditrifluoromethylphenyl)borate, and dimethylaniliniumtetra(perfluoronaphthyl)borate.

Further, a second example of the borate compound is represented by thefollowing general formula (III).

[L²]⁺[BR^(b)R^(c)X^(b)X^(c)]⁻  (III)

In the formula (III), as L², there may be mentioned a carbocation, amethyl cation, an ethyl cation, a propyl cation, an isopropyl cation, abutyl cation, an isobutyl cation, a tert-butyl cation, a pentyl cation,a tropinium cation, a benzyl cation, a trityl cation, a sodium cation, aproton, and the like. Further, R^(b), R^(c), X^(b), and X^(c) are thesame as the definitions in the above general formula (II).

As specific examples of the above compound, there can be exemplifiedtrityl tetraphenylborate, trityl tetra(o-tolyl)borate, trityltetra(p-tolyl)borate, trityl tetra(m-tolyl)borate, trityltetra(o-fluorophenyl)borate, trityl tetra(p-fluorophenyl)borate, trityltetra(m-fluorophenyl)borate, trityl tetra(3,5-difluorophenyl)borate,trityl tetra(pentafluorophenyl)borate, trityl tetra(2,6ditrifluoromethylphenyl)borate, trityltetra(3,5-ditrifluoromethylphenyl)borate, trityltetra(perfluoronaphthyl)borate, tropinium tetraphenylborate, tropiniumtetra(o-tolyl)borate, tropinium tetra(p-tolyl)borate, tropiniumtetra(m-tolyl)borate, tropinium tetra(o-fluorophenyl)borate, tropiniumtetra(p-fluorophenyl)borate, tropinium tetra(m-fluorophenyl)borate,tropinium tetra(3,5-difluorophenyl)borate, tropiniumtetra(pentafluorophenyl)borate, tropiniumtetra(2,6-ditrifluoromethylphenyl)borate, tropinium tetra(3,5-ditrifluoromethylphenyl)borate, tropiniumtetra(perfluoronaphthyl)borate, NaBPh₄, NaB(o-CH₃-Ph)₄, NaB(p-CH₃-Ph)₄,NaB(m-CH₃-Ph)₄, NaB(o-F-Ph)₄, NaB(p-F-Ph)₄, NaB(m-F-Ph)₄,NaB(3,5-F₂-Ph)₄, NaB(C₆F₅)₄, NaB(2,6-(CF₃)2-Ph)₄, NaB(3,5-(CF₃)₂-Ph)₄,NaB(C₁₆F₇)₄, HBPh₄.2 diethyl ether, HB(3,5-F₂-Ph)₄.2 diethyl ether,HB(C₆F₅)₄.2 diethyl ether, HB(2,6-(CF₃)₂-Ph)₄.2 diethyl ether,HB(3,5-(CF₃)₂-Ph)₄.2 diethyl ether, and HB(C₁₀H₇)₄.2 diethyl ether.

Of these, preferred are trityl tetra(pentafluorophenyl)borate, trityltetra(2,6-difluoromethylphenyl)borate, trityltetra(3,5-ditrifluoromethylphenyl)borate, trityltetra(perfluoronaphthyl)borate, tropiniumtetra(pentafluorophenyl)borate, tropiniumtetra(2,6-ditrifluoromethylphenyl)borate, tropiniumtetra(3,5-ditrifluoromethylphenyl)borate, tropiniumtetra(perfluoronaphthyl)borate, NaB(C₆F₅)₄, NaB(2,6-(CF₃)₂-Ph)₄,NaB(3,5-(CF₃)₂-Ph)₄, NaB(C₁₀F₇)₄HB(C₆F₅)₄.2 diethyl ether,HB(2,6-(CF₃)₂-Ph)₄.2 diethyl ether, HB(3,5-(CF₃)₂-Ph)₄.2 diethyl ether,and HB(C₁₀H₇)₄.2 diethyl ether.

More preferably, of these, there may be mentioned trityltetra(pentafluorophenyl)borate, trityltetra(2,6-ditrifluoromethylphenyl)borate, tropiniumtetra(pentafluorophenyl)borate, tropiniumtetra(2,6-difluoromethylphenyl)borate, NaB(C₆F₅)₄, NaB(2,6-(CF₃)₂-Ph)₄,HB(C₆F₅)₄.2 diethyl ether, HB(2,6-(CF₃)₂-Ph)₄.2 diethyl ether,HB(3,5-(CF₃)₂-Ph)₄.2 diethyl ether, and HB(C₁₀H₇)₄.2 diethyl ether.

(4) Component (C)

As the fine particle carrier that is the component (C), the catalyst forolefin polymerization of the present invention preferably uses aninorganic carrier, a particulate polymer carrier, or a mixture thereof.As the inorganic carrier, a metal, a metal oxide, a metal chloride, ametal carbonate, a carbonaceous material, or a mixture thereof can beused.

As suitable metals that can be used as the inorganic carriers, forexample, iron, aluminum, nickel, and the like may be mentioned.

Further, as the metal oxide, either single oxides or composite oxides ofGroups 1 to 14 elements of the Periodic Table can be mentioned and, forexample, there can be exemplified natural or synthetic various singleoxides or composite oxides such as SiO₂, Al₂O₃, MgO, CaO, B₂O₃, TiO₂,ZrO₂, Fe₂O₃, Al₂O₃.MgO, Al₂O₃.CaO, Al₂O₃.SiO₂, Al₂O₃.MgO.CaO,Al₂O₃.MgO.SiO₂, Al₂O₃.CuO, Al₂O₃.Fe₂O₃, Al₂O₃.NiO, SiO₂.MgO, and thelike. Here, the above formula is not a molecular formula and onlyrepresents the composition, and the structure and catalyst componentratio of the composite oxide to be used in the present invention are notparticularly limited. The metal oxide to be used in the invention may beone that has absorbed a small amount of moisture and also may be onethat contains a small amount of impurities.

As the metal chloride, for example, a chloride of an alkali metal or analkaline earth metal is preferred, and specifically, MgCl₂, CaCl₂, andthe like are especially preferred. As the metal carbonate, a carbonateof an alkali metal or an alkaline earth metal is preferred, andspecifically, magnesium carbonate, calcium carbonate, barium carbonate,and the like may be mentioned.

As the carbonaceous material, for example, carbon black, active carbon,and the like may be mentioned.

The above inorganic carriers can be all suitably used in the inventionbut particularly, the use of a metal oxide, silica, alumina, or the likeis preferred.

These inorganic carriers are preferably used after calcined at usually200° C. to 800° C., preferably 400° C. to 600° C. in the air or an inertgas such as nitrogen or argon to regulate the amount of surface hydroxylgroups to 0.8 mmol/g to 1.5 mmol/g. The properties of the inorganiccarriers are not particularly limited but, usually, it is preferable touse an inorganic carrier having an average particle size of 5 μm to 200μm, preferably 10 μm to 150 μm, an average pore size of 20 Å to 1000 Å,preferably 50 Å to 500 Å, a specific surface area of 150 m²/g to 1000m²/g, preferably 200 m²/g to 700 m²/g, a pore volume of 0.3 cm³/g to 2.5cm³/g, preferably 0.5 cm³/g to 2.0 cm³/g, and an apparent specificgravity of 0.20 g/cm³ to 0.50 g/cm³, preferably 0.25 g/cm³ to 0.45g/cm³.

The above-described inorganic carrier can be, as a matter of course,used as it is but can be used after the carrier is brought into contactwith an organoaluminum compound such as trimethylaluminum,triethylaluminum, triisobutylaluminum, trihexylaluminum,tripropylaluminum, tributylaluminum, trioctylaluminum, tridecylaluminum,or diisobutylaluminum hydride, or an organoaluminum oxy compoundcontaining an Al—O—Al bond, as a pretreatment.

4. Preparation Method of Catalyst for Olefin Polymerization

The contact method of individual components at the time of obtaining thecatalyst for olefin polymerization composed of the component (A) whichis a metallocene compound that is an essential component of the methodfor producing the olefin-based polymer of the invention, the component(B) reacting with the component (A) to form a cationic metallocenecompound, and the component (C) that is a fine particle carrier is notparticularly limited and, for example, the following methods can bearbitrarily employed.

(I) After the component (A) and the component (B) are brought intocontact with each other, the component (C) is brought into contacttherewith.

(II) After the component (A) and the component (C) are brought intocontact with each other, the component (B) is brought into contacttherewith.

(III) After the component (B) and the component (C) are brought intocontact with each other, the component (A) is brought into contacttherewith.

Of these contact methods, the contact methods (I) and (III) arepreferred, and the contact method (I) is most preferred. In any contactmethods, there is usually employed a method of bringing the componentsinto contact with one another in an inert atmosphere such as nitrogen orargon, generally in the presence of a liquid inert hydrocarbon, e.g., anaromatic hydrocarbon such as benzene, toluene, xylene, or ethylbenzene(usually a carbon number of 6 to 12) or an aliphatic or alicyclichydrocarbon such as heptane, hexane, decane, dodecane, or cyclohexane(usually a carbon number of 5 to 12), under stirring or withoutstirring. This contact is preferably performed at a temperature ofusually −100° C. to 200° C., preferably −50° C. to 100° C., furtherpreferably 0° C. to 50° C., for 5 minutes to 50 hours, preferably 30minutes to 24 hours, more preferably 30 minutes to 12 hours.

Further, as the solvent to be used at the time of the contact of thecomponent (A), the component (B), and the component (C), as describedabove, there can be used both of an aromatic hydrocarbon solvent inwhich certain component(s) are soluble or sparingly soluble and analiphatic or alicyclic hydrocarbon solvent in which certain component(s)are insoluble or sparingly soluble.

In the case of carrying out the contact reaction of the componentsstepwise, the solvent or the like used in the preceding step may bedirectly used as a solvent in the subsequent contact reaction withoutremoving it. Alternatively, after the preceding contact reaction using asoluble solvent, a liquid inert hydrocarbon (e.g., an aliphatichydrocarbon, an alicyclic hydrocarbon, or an aromatic hydrocarbon, suchas pentane, hexane, decane, dodecane, cyclohexane, benzene, toluene, orxylene) in which certain component(s) are insoluble or sparingly solublemay be added thereto to recover a desired product as a solid matter or apart or all of the soluble solvent is once removed by a means such asdrying to take out the desired product as a solid matter, andthereafter, the subsequent contact reaction of the desired product maybe carried out using any of the above-described inert hydrocarbonsolvents. In the present invention, the contact reaction of thecomponents may be conducted plural times.

In the present invention, the use ratio of the component (A), thecomponent (B), and the component (C) is not particularly limited, but ispreferably in the following range.

In the case where an organoaluminum oxy compound is used as thecomponent (B), the atomic ratio of aluminum in the organoaluminum oxycompound to the transition metal (M) in the component (A) that is themetallocene compound of the present invention (Al/M) is desirably in therange of usually 1 to 100,000, preferably 5 to 1,000, more preferably 50to 200.

Moreover, in the case where a borane compound or a borate compound isused as the component (B), the atomic ratio of boron to the transitionmetal (M) in the component (A) that is the metallocene compound of theinvention (B/M) is desirably in the range of usually 0.01 to 100,preferably 0,1 to 50, more preferably 0.2 to 10.

Furthermore, in the case where a mixture of an organoaluminum oxycompound and a borane compound or a borate compound is used as thecomponent (B), for each compound in the mixture, it is desirable toselect a use ratio of each of Al and B the same as described aboveseparately relative to the transition metal (M) in the component (A)that is the metallocene compound of the invention.

The amount of the component (C) to be used, which is a fine particlecarrier, is 1 g, per 0.0001 to 5 mmol, preferably per 0.001 to 0.5 mmol,more preferably per 0.01 to 0.1 mmol of the transition metal (M) in thecomponent (A).

The component (A), the component (B), and the component (C) are broughtinto contact with one another by any of the contact methods (1) to (3),and thereafter, by removing the solvent, the catalyst for olefinpolymerization can be obtained as a solid catalyst. The removal of thesolvent is desirably performed under normal pressure or under reducedpressure, at 0 to 200° C., preferably at 20 to 150° C., for 1 minute to50 hours, preferably for 10 minutes to 10 hours.

Incidentally, the catalyst for olefin polymerization of the presentinvention can be also obtained by the following method.

(IV) The component (A) and the component (C) are brought into contactwith each other and the solvent is removed to form a solid catalystcomponent, which is brought into contact with the component (B) that isan organoaluminum oxy compound, a borane compound, a borate compound, ora mixture thereof under polymerization conditions.

(V) The component (B) that is an organoaluminum oxy compound, a boranecompound, a borate compound, or a mixture thereof is brought intocontact with the component (C) and the solvent is removed to form asolid catalyst component, which is brought into contact with thecomponent (A) under polymerization conditions.

Also in the case of the above contact methods (IV) and (V), as thecomponent ratio, the contact conditions, and the solvent removalconditions, the same conditions as described above can be used.

Further, as a component serving as both of the component (B) and thecomponent (C), it is also possible to use a layered silicate. Thelayered silicate is a silicate compound having a crystal structure inwhich planes configured by an ionic bond arid the like are stacked inparallel with a weak bonding force. Most layered silicates are naturallymainly produced as a main component of clay minerals, but these layeredsilicates are not particularly limited to naturally occurring ones andmay be artificially synthesized ones.

Of these, smectite group, vermiculite group, and mica group such asmontmorillonite, sauconite, beidellite, nontronite, saponite, hectorite,stevensite, bentonite, and taeniolite are preferable.

In general, natural products are often non-ion-exchangeable(non-swellable) and, in that case, in order to have a preferred ionexchangeability (or swellability), it is preferable to perform atreatment for imparting the ion exchangeability (or swellability). Amongsuch treatments, particularly preferred include the following chemicaltreatments. Here, as the chemical treatments, there can be used both ofa surface treatment in which impurities attached to the surface areremoved and a treatment which influences the crystal structure and/orchemical composition of the layered silicate. Specifically, there may bementioned (i) an acid treatment to be carried out using hydrochloricacid, sulfuric acid, or the like, (ii) an alkali treatment to be carriedout using NaOH, KOH, NH₃, or the like, (iii) a salt treatment using asalt composed of a cation containing at least one atom selected fromGroups 2 to 14 of the Periodic Table and at least one anion selectedfrom the group consisting of halogen atoms and inorganic acid-derivedanions, (iv) a treatment with an organic substance such as an alcohol, ahydrocarbon compound, formamide, or aniline, and the like. Thesetreatments may be carried out singly or in combination of two or morethereof.

As for the layered silicate, at any time before, during, or after anysteps, the particle properties can be regulated by grinding,granulating, sizing, fractionating, or the like. The method may be anypurposive one. In particular, as for the granulation method, forexample, there may be mentioned a spray granulation method, a rollinggranulation method, a compression granulation method, a stirringgranulation method, a briquetting method, a compacting method, anextrusion granulation method, a fluidized bed granulation method, anemulsifying granulation method, an in-liquid granulation method, and thelike. Among the above, particularly preferred granulation methods are aspray granulation method, a rolling granulation method, and acompression granulation method.

The layered silicate described above can be, as a matter of course, usedas it is, but the layered silicate can be used in combination with anorganoaluminum compound such as trimethylaluminum, triethylaluminum,triisobutylaluminum, tripropylaluminum, tributylaluminum,trihexylaluminum, trioctylaluminum, tridecylaluminum, ordiisobutylaluminum hydride or an organoaluminum oxy compound containingan Al—O—Al bond.

For supporting the component (A), which is an essential component of themethod for producing the olefin-based polymer of the present invention,on the layered silicate, the component (A) and the layered silicate maybe brought into contact with each other, or the component (A), theorganoaluminum compound, and the layered silicate may be brought intocontact with one another.

The contact method of the components is not particularly limited and,for example, the following method can be arbitrarily employed.

(VI) After the component (A) and the organoaluminum compound are broughtinto contact with each other, the resultant is brought into contact withthe layered silicate carrier.

(VII) After the component (A) and the layered silicate carrier arebrought into contact with each other, the resultant is brought intocontact with the organoaluminum compound.

(VIII) After the organoaluminum compound and the layered silicatecarrier are brought into contact with each other, the resultant isbrought into contact with the component (A).

Of these contact methods, the contact methods (IV) and (VIII) arepreferred. Even in any contact methods, there is usually employed amethod of bringing the components into contact with one another in aninert atmosphere such as nitrogen or argon, generally in the presence ofa liquid inert hydrocarbon, e.g., an aromatic hydrocarbon such asbenzene, toluene, xylene, or ethylbenzene (usually a carbon number of 6to 12) or an aliphatic or alicyclic hydrocarbon such as heptane, hexane,decane, dodecane, or cyclohexane (usually a carbon number of 5 to 12),under stirring or without stirring.

The use ratio of the component (A), the organoaluminum compound, and thelayered silicate carrier is not particularly limited, but is preferablyin the following range. The amount of the component (A) to be supportedis 0.0001 mmol to 5 mmol, preferably 0.001 mmol to 0.5 mmol, and morepreferably 0.01 to 0.1 mmol per 1 g of the layered silicate carrier.Further, the amount of Al to be supported in the case of using theorganoaluminum compound is desirably in the range of 0.01 mol to 100mol, preferably 0.1 to 50 mol, more preferably 0.2 mol to 10 mol.

For the method of supporting and solvent removal, the same conditions asin the case of the above inorganic carrier may be used. When the layeredsilicate is used as a component serving as both of the component (B) andthe component (C), the resulting ethylene-based polymer has narrowmolecular weight distribution. Furthermore, the polymerization activityis high and the productivity of the ethylene-based polymer havinglong-chain branches is improved. The thus obtained catalyst for olefinpolymerization may be used after a preliminary polymerization ofmonomers is performed as needed.

5. Method for Producing Olefin-Based Polymer

The above-described catalyst for olefin polymerization can be used forolefin polymerization, particularly homopolymerization of ethylene orcopolymerization of ethylene with an α-olefin.

in the method for producing the olefin-based polymer of the presentinvention, at least ethylene is preferably contained and it is preferredthat the polymer is substantially an ethylene-based polymer including anethylene homopolymer and a copolymer of ethylene and an α-olefin.

The α-olefins that are comonomers include those having a carbon numberof 3 to 30, preferably 3 to 8, and specifically, there may beexemplified propylene, 1-butene, 1-hexene, 1-octene, 4-methyl-1-pentene,and the like. As for the α-olefins, two or more α-olefins can be alsocopolymerized with ethylene. The copolymerization may be any ofalternating polymerization, random copolymerization, and blockpolymerization. In the case where ethylene is copolymerized with theother α-olefin, the amount of the other α-olefin can be arbitrarilyselected from the range of 90% by mol or less of the total monomers butis generally selected from the range of 40% by mol or less, preferably30% by mol or less, further preferably 10% by mol or less. As a matterof course, it is also possible to use a small amount of a comonomerother than ethylene and the α-olefins. In this case, there may bementioned compounds having a polymerizable double bond, for example,styrenes such as styrene, 4-methylstyrene, and 4-dimethylaminostyrene,dienes such as 1,4-butadiene, 1,5-hexadiene, 1,4-hexadiene, and1,7-octadiene, cyclic compounds such as norbornene and cyclopentene,oxygen-containing compounds such as hexenol, hexenoic acid, and methyloctenate, and the like.

In the present invention, the polymerization reaction can be carried outin the presence of the supported catalyst mentioned above, preferably byslurry polymerization or gas-phase polymerization. In the case of theslurry polymerization, ethylene and the like are polymerized in thepresence or absence of an inert hydrocarbon solvent selected fromaliphatic hydrocarbons such as isobutene, hexane, and heptane, aromatichydrocarbons such as benzene, toluene, and xylene, alicyclichydrocarbons such as cyclohexane and methylcyclohexane, in a state thatoxygen, water, and the like are substantially absent. It is needless tosay that a liquid monomer such as liquid ethylene or liquid propylenecan be also used as a solvent. Moreover, in the case of the gas-phasepolymerization, ethylene and the like are polymerized in a reactor intowhich gas flows of ethylene and a comonomer are introduced, allowed topass, or recycled. In the present invention, further preferablepolymerization is the gas-phase polymerization. As for polymerizationconditions, the temperature is 0° C. to 250° C., preferably 20° C. to110° C., and more preferably 60° C. to 100° C. and, when the temperatureis 60° C. to 90° C., there is a tendency that a larger amount of thelong-chain branches are introduced. Moreover, the pressure is in therange of normal pressure to 10 MPa, preferably normal pressure to 4 MPa,more preferably 0.5 MPa to 2 MPa. As the polymerization time, there iscommonly employed 5 minutes to 10 hours, preferably 5 minutes to 5hours.

The molecular weight of the produced polymer can be controlled to someextent by varying the polymerization conditions such as thepolymerization temperature and the molar ratio of the catalyst, but thecontrol of the molecular weight can be more effectively performed by theaddition of hydrogen to the polymerization reaction system.

Further, even when a component for the purpose of water removal, aso-called scavenger, is added into the polymerization system, thepolymerization can be carried out without any trouble. As such ascavenger, there are used organoaluminum compounds such astrimethylaluminum, triethylaluminum, and triisobutylaluminum, theabove-described organoaluminum oxy compounds, modified organoaluminumcompounds containing a branched alkyl, organozinc compounds such asdiethylzinc and dibutylzinc, organomagnesium compounds such asdiethylmagnesium, dibutylmagnesium, and ethylbutylmagnesium, Grignardcompounds such as ethylmagnesium chloride and butylmagnesium chloride.Of these, preferred are triethylaluminum, triisobutylaluminum, andethylbutylmagnesium, and particularly preferred is triethylaluminum. Itcan be also applied to a multistage polymerization method having two ormore stages in which polymerization conditions such as hydrogenconcentration, the amount of the monomer(s), polymerization pressure,and polymerization temperature are different from each other, withoutany trouble.

6. Physical Properties of Ethylene-Based Polymer

The olefin-based polymer, particularly ethylene-based polymer producedusing the catalyst for olefin polymerization of the present invention ischaracterized in that sufficient number and length of long-chainbranches are introduced and molding processability is more improved.

In general, a polyethylene is processed into industrial products by ashaping method via a melted state, such as film molding, blow molding,or foam molding. On this occasion, it is well known that elongationflowing properties greatly influence the easiness of molding. That is, apolyethylene having narrow molecular weight distribution and having nolong-chain branches has low melt strength and hence exhibits poormoldability. On the other hand, a polyethylene having an ultrahighmolecular weight component or a long-chain branch component is excellentin molding processability.

It is realized that the ethylene-based polymer produced by thepolymerization catalyst for olefin of the present invention hassufficient number and length of long-chin branches introduced thereinand is excellent in moldings processability, from values of thebranching index (g′) at molecular weights of 100,000 and 1,000,000measured by combining a GPC apparatus equipped with a differentialrefractometer (RI) and a viscosity detector (Viscometer) and a lightscattering detector.

Incidentally, in the present Description, the values of the branchingindex (g) at molecular weights of 100,000 and 1,000,000 are referred toas “g_(a)′” and “g_(b)′”, respectively.

Moreover, from the viewpoint of excellent molding processability andmechanical properties, the ethylene-based polymer of the presentinvention preferably has further the following characteristics.

(1) MFR

MFR (melt flow rate, 190° C., a load of 2.16 kg) of the ethylene-basedpolymer in the present invention is preferably 0.001 g/10 minutes to1,000 g/10 minutes, more preferably 0.01 g/10 minutes to 100 g/10minutes, further preferably 0.05 g/10 minutes to 50 g/10 minutes, andparticularly preferably 0.1 g/10 minutes to 50 g/10 minutes.

Incidentally, MFR of the ethylene-based polymer is a value as measuredin accordance with JIS K6760 (190° C., a load of 2.16 kg).

(2) Density

The density of the ethylene-based polymer in the present invention ispreferably 0.85 g/cm³ to 0.97 g/cm³, more preferably 0.88 g/cm³ to 0.95g/cm³, and further preferably 0.90 g/cm³ to 0.94 g/cm³.

Incidentally, the density of the ethylene-based polymer is a value asmeasured in accordance with JIS K7112.

(3) Mw/Mn

The molecular weight distribution (Mw/Mn) of the ethylene-based polymerin the present invention is preferably 2.0 to 10.0, more preferably 2.0to 9.0, further preferably 2.5 to 8.0, and particularly preferably 2.5to 7.5.

Incidentally, the molecular weight distribution (Mw/Mn) of theethylene-based polymer is defined by the ratio (Mw/Mn) of weight-averagemolecular weight (Mw) to number-average molecular weight (Mn) and is avalue as measured under the following conditions by a gel permeationchromatographic (GPC) method.

The conversion from the retention volume to the molecular weight isperformed using a calibration curve prepared in advance with standardpolystyrene. The standard polystyrenes used are all produced by TosohCorporation under the following brand names:

F380, F288, F128, F80, F40, F20, F10, F4, F1, A5000, A2500, A1000. Acalibration curve is created by injecting 0.2 mL of a solution preparedby dissolving each standard polystyrene in ODCB (containing 0.5 mg/mL ofBHT) to provide a concentration of 0.5 mg/mL. As the calibration curve,a cubic expression obtained by approximation according to the leastsquare method is used. In the viscosity formula [η]=K×M^(α) used for theconversion into the molecular weight, the following numerical values areused.

PS: K=1.38×10⁻⁴, α=0.7

PE: K=3.92×10⁻⁴, α=0.733

PP: K=1.03×10⁻⁴, α=0.78

Incidentally, the measurement conditions of GPC are as follows.

Apparatus: GPC (ALC/GPC 1500) manufactured by WATERS Co.

Detector: MIRAN 1A IR detector manufactured by FOXBORO Co. (measurementwavelength: 3.42 μm)

Columns: AD806M/S (3 columns) manufactured by Showa Denko K.K.

Mobile phase solvent: o-dichlorobenzene

Measurement temperature: 140° C.

Flow rate: 1.0 ml/minute

Injection amount: 0.2 ml

Sample preparation: as for a sample, a 1 mg/mL solution is preparedusing ODCB (containing 0.5 mg/mL of BHT) and dissolution is achieved at140° C. with taking a time of about 1 hour. Incidentally, the baselineand section of the resulting chromatogram is taken as exemplified inFIG. 1.

(4) Branching Indices (g_(a)′ and g_(b)′)

In the ethylene-based polymer of the present invention, the branchingindex (g_(a)′) at a molecular weight of 100,000 is preferably 0.50 to0.99, more preferably 0.50 to 0.94, further preferably 0.50 to 0.87, andstill further preferably 0.55 to 0.80. In the case where the branchingindex (g_(a)′) falls within the above range, an ethylene-based polymerhaving an excellent balance between elongation viscosity behavior andmelt fluidity is obtained.

In the ethylene-based polymer of the present invention, g_(b)′ is 0.30to 0.75, preferably 0.30 to 0.68, more preferably 0.35 to 0.55, andfurther preferably 0.35 to 0.50. When the g_(b)′ value is larger than0.75, there are cases not preferable due to insufficient moldingprocessability of the ethylene-based polymer and deficient transparencythereof. When the g_(b)′ value is smaller than 0.30, the moldingprocessability of the ethylene-based polymer is enhanced but impactstrength of a molded body decreases or transparency deteriorates, sothat there are cases not preferable.

Incidentally, the branching indices (g_(a)′ and g_(b)′) are values asmeasured by the following method.

(i) Branch Structure Analysis by GPC-VIS

As the GPC apparatus which is equipped with a differential refractometer(RI) and a viscosity detector (Viscometer), Alliance GPCV2000 of WATERSCo. was used. Moreover, as the light scattering detector, a multi-anglelaser light scattering detector (MALLS) DAWN-E of Wyatt Technology Co.is used. The detectors are connected in the order of MALLS, RI, andViscometer. The mobile phase solvent is 1,2,4-trichlorobenzene (anantioxidant Irganox1076 is added at a concentration of 0.5 mg/mL). Theflow rate is 1 mL/minute. As the columns, two columns of GMHHR-H(S) HTof Tosoh Corporation are connected and used. The temperature at thesample injection port and at each detector is 140° C. The sampleconcentration is 1 mg/mL. The injection amount (sample loop volume) is0.2175 mL. At the time of determining absolute molecular weight (M) andinertial square radius (Rg) obtained from MALLS and intrinsic viscosity([η]) obtained from Viscometer, calculation is performed utilizing adata processing software ASTRA (version 4.73.04) attached to MALLS withreference to the following literatures.

REFERENCE LITERATURES

1. Developments in polymer characterization, vol. 4. Essex; AppliedScience; 1984. Chapter 1.

2. Polymer, 45, 6495-6505 (2004)

3. Macromolecules, 33, 2424-2436 (2000)

4. Macromolecules, 33, 6945-6952 (2000)

(ii) Calculation of Branching Indices (g_(a)′ and g_(b)′)

The branching index (g_(a)′) is calculated as a ratio (ηbranch/ηlin) ofthe intrinsic viscosity (ηbranch) obtained by measuring a sample by theabove Viscometer to the intrinsic viscosity (ηlin) obtained byseparately measuring a linear polymer.

When a long-chain branch is introduced into a polymer molecule, aninertial radius decreases as compared with a linear polymer moleculehaving the same molecular weight. Since the intrinsic viscositydecreases when the inertial radius decreases, the ratio (ηbranch/ηlin)of the intrinsic viscosity (ηbranch) of a branched polymer to theintrinsic viscosity (ηlin) of a linear polymer having the same molecularweight decreases as the long-chain branches are introduced. Therefore,the case where the branching index (g_(a)′=ηbranch/ηlin) becomes a valuesmaller than 1 means that branches are introduced, and it is meant thatthe introduced long-chain branches increase as the value decreases.

FIG. 2 shows an example of analysis results by the above GPC-VIS. FIG. 2represents a branching index (g_(a)′) at a molecular weight (M). The g′value at logM=5 was taken as g_(a)′ and the g′ value at logM=6 was takenas g_(b)′. Here, as the linear polymer, a linear polyethylene StandardReference Material 1475a (National Institute of Standards & Technology)is used.

EXAMPLES

The present invention is specifically described below with reference toExamples but the invention should not be construed as being limited tothese Examples. Incidentally, the evaluation methods used in Examplesare as follows. All of the following catalyst synthesis steps andpolymerization step were performed in a purified nitrogen atmosphere,and the solvents used were dehydrated and purified with molecular sieves4 A.

1. Various Evaluation (Measurement) Methods (1) MFR:

It was measured at 190° C. at a load of 2.16 kg in accordance with ESK6760. FR (flow rate ratio) was calculated from a ratio (=MFR10kg/MFR)of MFR10kg that is MFR similarly measured under the conditions of 190°C. and a load of 10 kg to MFR.

(2) Measurement of Molecular Weight Distribution (Mw/Mn):

It was measured by the method described in the article of “(3) Mw/Mn” of“6. Physical Properties of Ethylene-based Polymer” mentioned before.

(3) Measurement of Branching Index (g′):

It was measured by the method described in the article of “(4) BranchingIndices (g_(a)′ and g_(b)′)” of “6. Physical Properties ofEthylene-based Polymer” mentioned before.

2. Using Materials [Synthesis of Metallocene Compound] (1) Synthesis ofMetallocene Compound A:dimethylsilylene(2,5-dimethyl-3-phenyl-cyclopento[2,3-b]thiophene-6-yl)(cyclopentadienyl)zirconiumdichloride (1-1) Synthesis of2,5-dimethyl-3-phenyl-6-hydrocyclopenta[1,2-b]thiophene

Synthesis of 2,5dimethyl-3-phenyl-6-hydrocyclopenta[1,2-b]thiophene wasconducted according to the procedure described in Experimental of J. Am.Chem. Soc. 2001, 123, 4763-4773.

(1-2) Synthesis of(2,5-dimethyl-3-phenyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane

After 3.48 g (15.38 mmol) of2,5-dimethyl-3-phenyl-6-hydrocyclopenta[1,2-b]thiophene and 35 ml of THFwere added to a 100 ml flask to form a solution, it was cooled to −78°C. and 7.38 ml (18.5 mmol) of an n-butyllithium/hexane solution (2.5M)was added thereto, followed by stirring at 10° C. for 3 hours. To a 100ml flask prepared separately were added 3.97 g (30.76 mmol) ofdimethyldichlorosilane and 20 ml of THE, and the whole was cooled to−78° C. and the previous reaction solution was added thereto. The wholewas stirred at 10° C. for 12 hours. A yellow solution was obtained byremoving volatile matter by distillation under reduced pressure. To theyellow solution was added 58.5 ml of thus forming a solution, and 8.08ml (16.2 mmol) of a sodium cyclopentadienylide/THF solution (2M) wasslowly added thereto at −30° C. The whole was stirred at 10° C. for 90minutes. The reaction product was slowly added to 100 ml of ice water,extracted with 100 ml of ethyl acetate twice, the resulting organicphase was dried over anhydrous sodium sulfate. Sodium sulfate wasfiltered, the solution was subjected to removal by distillation underreduced pressure, and purification was performed through a silica gelcolumn to obtain 2.97 g (yield 55%) of a yellow oil of(2,5-dimethyl-3-phenyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane.

(1-3) Synthesis ofdimethylsilylene(2,5-dimethyl-3-phenyl-cyclopento[2,3-b]thiophene-6-yl)(cyclopentadienyl)zirconiumdichloride

To a 200 ml flask were added 2.97 g (8.52 mmol) of(2,5-dimethyl-3-phenyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane and 30 ml of diethyl ether, followed by cooling to −78° C.Thereto was added dropwise 7.16 ml (17.9 mmol) of ann-butyllithium/n-hexane solution (2.5M), and the temperature wasreturned to room temperature, followed by stirring for 3 hours. Thesolvent of the reaction solution was removed by distillation underreduced pressure, 90 ml of dichloromethane was added thereto, and thewhole was cooled to −78′C. Thereto was added 2.08 g (8.95 mmol) ofzirconium tetrachloride, and the whole was stirred overnight while thetemperature was returned to room temperature. The reaction solution wasfiltered and the solvent was removed by distillation from the filtrateunder reduced pressure, thereby obtaining a yellow powder. The powderwas washed with a mixed solvent of 18 ml of toluene and 6 ml ofn-pentane to obtain 0.98 g (yield 22%) of yellow crystals ofmethylsilylene(2,5-dimethyl-3-phenyl-cyclopento[2,3-b]thiophene-6-yl)(cyclopentadienyl)zirconium dichloride.

¹H-NMR values (CDCl₃): δ 0.90 (s, 3H), δ 0.95 (s, 3H), δ 2.24 (s, 3H), δ2.55 (s, 3H), δ 5.94 (t, 2H), δ 6.55 (s, 1H), δ 6.92 (m, 2H), δ 7.34 (m,1H), δ 7,45 (t, 2H), δ 7.53 (m, 2H).

(2) Synthesis of Metallocene Compound B:dimethylsilylene(3-phenyl-cyclopento[2,3-b]thiophene-6-yl)(cyclopentadienyl)zirconiumdichloride (2-1) Synthesis of 4-phenylthiophene-2-carboxyaldehyde

After 2.00 g (11.49 mmol) of 4-bromothiophene-2-carboxyaldehyde, 1.40 g(11.49 mmol) of phenylboronic acid, 2.44 g (22.98 mmol) of sodiumcarbonate, 15 ml of toluene, 15 ml of ethanol, and 5 ml of water wereadded to a 100 ml flask under nitrogen, 663.96 mg of Pd(PPh₃)₄ was addedthereto and the whole was stirred at 100° C. for 6 hours. Extraction wasperformed with 100 ml of ethyl acetate twice and the resulting organicphase was washed with 50 ml of water and 50 ml of a saturated aqueoussodium chloride solution and dried over anhydrous sodium sulfate. Sodiumsulfate was filtered, the solution was subjected to removal bydistillation under reduced pressure, and purification was performedthrough a silica gel column to obtain 1.60 g (yield 81.3%) of a yellowsolid of 4-phenylthiophene-2-carboxyaldehyde.

(2-2) Synthesis of 3-(4-phenyl-2-thienyl)-propionic acid

Under nitrogen, 29.53 g (256.25 mmol) of triethylamine was added to a300 ml flask and 30.78 g (640.64 mmol) of formic acid was slowly addedthereto at 0° C. After the mixture was stirred at 25° C. for 1.5 hours,15 ml of DMF was added thereto. Subsequently, a DMF (100 ml) solution of16.16 g (112.11 mmol) of 2,2-dimethyl-1,3-dioxane-4,6-dione was added,and further, 20.10 g (106.77 mmol) of4-phenylthiophene-2-carboxyaldehyde was added thereto at 25° C. When themixture was stirred at 100° C. for 72 hours, it became a brown solution.The reaction solution was added to 150 ml of ice water and pH wasadjusted to 1 with 15 ml of 6N hydrochloric acid, thereby precipitatinga solid. The precipitated solid was collected by filtering and washedwith 20 ml of water five times and with 100 ml of ethyl acetate twice toobtain 22.67 g (yield 91.40%) of a yellow solid of3-(4-phenyl-2-thienyl)-propionic acid.

(2-3) Synthesis of 3-phenyl-cyclopenteno[2,3-b]thiophen-4-one

To a 100 ml flask was added 20.60 g (88.68 mmol) of3-(4-phenyl-2-thienyl)-propionic acid, and 23.06 g (15.17 ml, 96.86mmol) of the Eaton reagent was added thereto at 78 to 83° C. After themixture was stirred at 80° C. for 1 hour, it was poured into 200 ml ofice water and extraction was performed with 200 ml of dichloromethanethree times. The resulting organic phase was washed with 200 ml of anaqueous sodium carbonate solution and dried over anhydrous sodiumsulfate. Sodium sulfate was filtered, the solution was subjected toremoval by distillation under reduced pressure, and purification wasperformed through a silica gel column, thereby obtaining 8.20 g (yield43.2%) of a pale yellow solid of3-phenyl-cyclopenteno[2,3-b]thiophen-4-one.

(2-4) Synthesis of 3-phenyl-6-hydrocyclopenta[1,2-b]thiophene

Under nitrogen, 3.00 g (14.00 mmol) of3-phenyl-cyclopenteno[2,3-b]thiophen-4-one and 50 ml of anhydrous THFwere added to a 100 ml flask, and 425.04 mg (11.20 mmol) of lithiumaluminum hydride was added thereto at 0° C. After the mixture wasstirred at 20° C. for 1.5 hours, the reaction product was poured into 20ml ice water and extracted with 50 ml of ethyl acetate three times. Theresulting organic phase was washed with 50 ml of a saturated aqueousammonium chloride solution twice and dried over anhydrous sodiumsulfate. Sodium sulfate was filtered and the solution was subjected toremoval by distillation under reduced pressure to obtain 2.85 g of ayellow solid.

Under nitrogen, 2.85 g of the above yellow solid and 150 ml of toluenewere added to a 300 ml flask, and 25.06 mg (131.80 μmol) ofp-toluenesulfonic acid monohydrate and 27.19 mg (131.80 μmol) of2,6-di-t-butylphenol were added thereto. When the mixture was stirred at110° C. for 2 hours, a pale yellow solution was obtained. The resultingpale yellow solution was poured into 50 ml of a saturated aqueous sodiumhydrogen carbonate solution and the organic phase was separated. Theaqueous phase was extracted with 30 ml of ethyl acetate three times, theresulting organic phase was mixed with the previous organic phase, andthe mixed one was dried over anhydrous sodium sulfate. Sodium sulfatewas filtered, the solution was subjected to removal by distillationunder reduced pressure, and purification was performed through a silicagel column to obtain 1.15 g (yield 44.0%) of a pale yellow oil of3-phenyl-6-hydrocyclopenta[1,2-b]thiophene.

(2-5) Synthesis of(3-phenyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane

After 1.10 g (5.55 mmol) of 3-phenyl-6-hydrocyclopenta[1,2-b]thiopheneand 30 ml of THF were added to a 100 ml flask under nitrogen to form asolution, it was cooled to −78° C. and 2.66 ml (6.65 mmol) of ann-butyllithium/hexane solution (2.5M) was added, followed by stirring at10° C. for 3 hours. To a 100 ml flask prepared separately were added1.43 g (11.10 mmol) of dimethyldichlorosilane and 10 ml of THF, and thewhole was cooled to −78° C. and the previous reaction solution was addedthereto. After the whole was stirred at 10° C. for 12 hours, 1.61 g of apale yellow solid was obtained by removing volatile matter bydistillation under reduced pressure. To the pale yellow solid was added30 ml of THF, thus forming a solution, and 3.05 ml (6.1 mmol) of asodium cyclopentadienylide/THF solution (2M) was added thereto at −30°C. The whole was stirred at 10° C. for 90 minutes. The reaction productwas added to 20 ml of ice water and the organic phase was separated. Theaqueous phase was extracted with 50 ml of ethyl acetate twice, theresulting organic phase was mixed with the previous organic phase, andthe mixed one was dried over anhydrous sodium sulfate. Sodium sulfatewas filtered, the solution was subjected to removal by distillationunder reduced pressure, and purification was performed through a silicagel column to obtain 690 mg (yield 38.8%) of a pale yellow oil of(3-phenyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane.

(2-6) Synthesis ofdimethylsilylene(3-phenyl-cyclopento[2,3-b]thiophen-6-yl)(cyclopentadienyl)zirconiumdichloride

To a 200 ml flask were added 2.50 g (7.80 mmol) of(3-phenyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilaneand 50 ml of diethyl ether, followed by cooling to −78° C. Thereto wasadded dropwise 6.55 ml (16.4 mmol) of an n-butyllithium/n-hexanesolution (2.5M), followed by stirring at 10° C. for 3 hours. The solventof the reaction solution was removed by distillation under reducedpressure, 90 ml of dichloromethane was added thereto, and the whole wascooled to −78° C. Thereto was added 1.91 g (8.18 mmol) of zirconiumtetrachloride, the temperature was raised to 10° C. over a period of 3hours, and the whole was further stirred at 10° C. overnight. Thereaction solution was filtered and the solvent was removed bydistillation from the resulting filtrate under reduced pressure, therebyobtaining a yellow powder. The powder was washed with a mixed solvent of11 ml of toluene and 4 ml of n-pentane and further extracted with 90 mlof dichloromethane to remove insoluble matter. The resultingdichloromethane solution was subjected to removal by distillation underreduced pressure, thereby obtaining 0.9 g (yield 24%) of yellow crystalsofdimethylsilylene(3-phenyl-cyclopento[2,3-b]thiophen-6-yl)(cyclopentadienyl)zirconiumdichloride.

¹H-NMR values (CDCl₃): δ 0.86 (s, 3H), δ 0.91 (s, 3H), δ 5.94 (m, 1H), δ6.00 (m, 1H), δ 6.14 (m, 1H), δ 6.90 (m, 1H), δ 6.95 (m, 1H), δ 7.04 (d,3H), δ 7.35 (t, 1H), δ 7.44 (t, 2H), δ 7.52 (d, 1H), δ 7.66 (d, 2H).

(3) Synthesis of Metallocene Compound C:dimethylsilylene(3-(5-methyl-2-phenyl)-cyclopento[2,3-b]thiophene-6-yl)(cyclopentadienyl)zirconiumdichloride (3-1) Synthesis of 4-bromothiophene-2-carboxyaldehyde

Under nitrogen, 17.00 g (70.27 mmol) of 3,4-dibromothiophene and 35 mlof diethyl ether were added to a 300 ml flask, and 28.11 ml (70.28 mmol)of an n-butyllithium/n-hexane solution (2.5M) was slowly added dropwiseat −78° C., followed by stirring still at −78° C. for 15 minutes.Subsequently, 5.14 g (70.27 mmol) of DMF was added thereto and the wholewas stirred at −78° C. for 3 hours. The reaction solution was warmed to15° C. and 40 ml of water was added thereto. Extraction was performedwith 50 ml of ethyl acetate twice and the organic phase was dried overpotassium carbonate. Potassium carbonate was filtered and the solutionwas subjected to removal by distillation under reduced pressure toobtain 15 g (purity about 80%) of a crude product of4-bromothiophene-2-carboxyaldehyde.

(3-2) Synthesis of 3-(4-bromo-3-thienyl)-propionic acid

Under nitrogen, 7.54 g (157.02 mmol) of formic acid was added to a 300ml flask, and 6.36 g (62.81 mmol) of triethylamine was slowly addedthereto at 0° C. After the mixture was stirred at 20° C. for 1.5 hours,50 ml of DMF was added thereto. Subsequently, a DMF (10 ml) solution of3.96 g (27.48 mmol) of 2,2-dimethyl-1,3-dioxane-4,6-dione was added, andfurther, a DMF (10 ml) solution of 5.00 g (26.17 mmol) of4-bromothiophene-2-carboxyaldehyde was added thereto at 20° C. When themixture was stirred at 100° C. for 12 hours, it became a brown solution.The reaction solution was added to 100 ml of ice water and pH wasadjusted to 12 with a 2N aqueous sodium hydroxide solution. Extractionwas performed with 100 ml of dichloromethane twice and the aqueous layerwas adjusted to pH 1 with 6N hydrochloric acid and again extracted with100 ml of dichloromethane three times. The organic phase was dried overanhydrous sodium sulfate. Sodium sulfate was filtered and the solutionwas subjected to removal by distillation under reduced pressure toobtain 4.30 g of a crude product of 3-(4-bromo-3-thienyl)-propionicacid.

(3-3) Synthesis of 3-bromo-cyclopenteno[2,3-b]thiophen-6-one

To a 200 ml flask was added 111.38 g (73.28 ml, 467.89 mmol) of theEaton reagent, and 11.00 g (46.79 mmol) of3-(4-bromo-2-thienyl)-propionic acid was added thereto at 40° C. Afterthe mixture was stirred at 40° C. for 30 minutes, it was poured into 200ml of ice water and extraction was performed with 200 ml ofdichloromethane four times. The resulting organic phase was washed with200 ml of a saturated aqueous sodium hydrogen carbonate solution anddried over anhydrous sodium sulfate. Sodium sulfate was filtered, thesolution was subjected to removal by distillation under reducedpressure, and purification was performed through a silica gel column toobtain 1.90 g (yield 18.7%) of a yellow solid of3-bromo-cyclopenteno[2,3-b]thiophen-6-one.

(3-4) Synthesis of3-(5-methyl-2-furyl)-cyclopenteno[2,3-b]thiophen-6-one

After 8.00 g (36.85 mmol) of 3-bromo-cyclopenteno[2,3-b]thiophen-6-one,423.81 mg (737.00 μmol) of Pd(dba)₂, 773.29 mg (2.95 mmol) oftriphenylphosphine, and 200 ml of toluene were added to a 500 ml flaskunder nitrogen, a toluene (40 ml) solution of 16.41 g oftri(n-butyl)(5-methyl-2-furyl)tin prepared separately was added thereto,followed by stirring at 110° C. for 16 hours. The reaction solution wasdiluted with 300 ml of ethyl acetate and the diluted solution was washedwith 200 ml of a 5% aqueous potassium fluoride solution. After theorganic phase was separated, the aqueous phase was extracted with 200 mlof ethyl acetate twice. The resulting organic phase was mixed with theprevious organic phase and the mixed one was washed with 300 ml of asaturated aqueous sodium chloride solution and dried over anhydroussodium sulfate. Sodium sulfate was filtered, the solution was subjectedto removal by distillation under reduced pressure, purification wasperformed through a silica gel column, and further recrystallization wasconducted from a mixed solvent of ethyl acetate/petroleum ether toobtain 7.04 g (yield 87.5%) of a yellow solid of3-(5-methyl-2-furyl)-cyclopenteno[2,3-b]thiophen-6-one.

(3-5) Synthesis of3-(5-methyl-2-furyl)-6-hydrocyclopenta[1,2-b]thiophene

Under nitrogen, 4.00 g (18.33 mmol) of3-(5-methyl-2-furyl)-cyclopenteno[2,3-b]thiophen-6-one and 40 ml ofethanol were added to a 100 ml flask, and 3.58 g (19.25 mmol) of4-methylbenzenesulfonohydrazide and 697.19 mg (3.67 mmol) oftoluenesulfonic acid monohydrate were added thereto at 20° C. Themixture was stirred at 78° C. for 16 hours to obtain a yellowsuspension. After cooling to 0° C., a yellow solid was recovered byfiltering and washed with 10 ml of ethanol cooled to 0° C. three times,and then the yellow solid was dried under reduced pressure.

Under nitrogen, the obtained yellow solid and 300 ml of THF were addedto a 500 ml flask, and 16.04 ml (40.1 mmol) of ann-butyllithium/n-hexane solution (2.5M) was added dropwise at −78° C.,followed by stirring at 66° C. for 20 minutes. The reaction solution waspoured into 200 ml of ice water and, after the organic phase wasseparated, the aqueous phase was extracted with 200 ml of ethyl acetatetwice. The resulting organic phase was mixed with the previous organicphase and the mixed one was dried over anhydrous sodium sulfate. Sodiumsulfate was filtered, the solution was subjected to removal bydistillation under reduced pressure, and purification was performedthrough a silica gel column to obtain 2.27 g (yield 61,4%) of a yellowoil of 3-(5-methyl-2-furyl)-6-hydrocyclopenta[1,2-b]thiophene

(3-6) Synthesis of(3-(5-methyl-2-furyl)-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane

Under nitrogen, 1.00 g (4.94 mmol) of3-(5-methyl-2-furyl)-6-hydrocyclopenta[1,2-b]thiophene and 20 ml of THFwere added to a 100 ml flask, the whole was cooled to −78° C., and 2.37ml (5.93 mmol) of an n-butyllithium/hexane solution (2.5M) was added,followed by stirring at 20° C. for 3 hours. Subsequently, 11.06 ml (7.41mmol) of a cyclopentadienyldimethylsilyl chloride/hexane solution(0.67M) was slowly added thereto at −78° C., and the whole was stirredat 20° C. for 1.5 hours. The reaction solution was poured into 150 ml ofice water and extracted with 100 ml of ethyl acetate four times. Theorganic phase was washed with a saturated aqueous sodium chloridesolution and dried over anhydrous sodium sulfate. Sodium sulfate wasfiltered, the solution was subjected to removal by distillation underreduced pressure, and purification was performed through a silica gelcolumn to obtain 1.04 g (yield 64.9%) of a pale yellow oil of(3-(5-methyl-2-furyl)-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane.

(3-7) Synthesis of dimethylsilylene(3-(5-methyl-2-furyl)-cyclopento[2,3-b]thiophen-6-yl)(cyclopentadienyl)zirconiumdichloride

Under nitrogen, 1.20 g (3.70 mmol) of(3-(5-methyl-2-furyl)-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilaneand 18 ml of diethyl ether were added to a 200 ml flask, followed bycooling to −78° C. Thereto was added dropwise 3.11 ml (7.78 mmol) of ann-butyllithium/n-hexane solution (2.5M), followed by stirring at 20° C.for 3 hours. The solvent of the reaction solution was removed bydistillation under reduced pressure, 50 ml of dichloromethane was addedthereto, and the whole was cooled to −78° C. Thereto was added 947.93 mg(4.07 mmol) of zirconium tetrachloride, the temperature was raised to20° C. over a period of 3 hours, and the whole was further stirred at20° C. overnight. The reaction solution was filtered and the solvent wasremoved by distillation from the resulting filtrate under reducedpressure, thereby obtaining a yellow powder. The powder was washed witha mixed solvent of 10 ml of toluene and 5 ml of n-pentane and furtherextracted with 50 ml of toluene to remove insoluble matter. Theresulting toluene solution was subjected to removal by distillationunder reduced pressure, thereby obtaining 270 mg (yield 15,1%) of agreen solid ofdimethylsilylene(3-(5-methyl-2-furyl)-cyclopento[2,3-b]thiophen-6-yl)(cyclopentadienyl)zirconiumdichloride.

¹H-NMR values (CDCl₃): δ 0.85 (s, 3H), δ 0.89 (s, 3H), δ 2.36 (s, 3H), δ5.92 (d, 1H), δ 5.99 (d, 1H), δ 6.07 (d, 1H), δ 6.13 (d, 1H), δ 6.50 (d,1H), δ 6.87 (d, 1H), δ 6.93 (d, 1H), δ 7.00 (d, 1H), δ 7.56 (s, 1H).

(4) Synthesis of Metallocene Compound D:dimethylsilylene(3-phenyl-4-methyl-cyclopento[2,3-b]thiophene-6-yl)(cyclopentadienyl)zirconiumdichloride (4-1) Synthesis of3-phenyl-4-methyl-6-hydrocyclopenta[1,2-b]thiophene

Under nitrogen, 8.00 g (37.33 mmol) of3-phenyl-cyclopenteno[2,3-b]thiophen-4-one obtained in (2-3) of (2)Synthesis of metallocene compound (B) and 100 ml of toluene were addedto a 200 ml flask, and 18.67 ml (56.01 mmol) of methylmagnesium bromide(3M) was added thereto at 0° C., followed by stirring at 15° C. for 12hours. The reaction solution was poured into 100 ml of ice water and theorganic phase was separated and dried over anhydrous sodium sulfate.Sodium sulfate was filtered and the solution was subjected to removal bydistillation under reduced pressure to obtain 8.3 g of a brown oil.

Under nitrogen, 5.00 g of the above brown oil and 500 ml of toluene wereadded to a 1000 ml flask, and 41.29 mg (217.1 μmol) of toluenesulfonicacid monohydrate and 44.79 mg (217.1 μmol) of 2,6-di-t-butylphenol wereadded thereto, followed by stirring at 110° C. for 1 hour. After coolingto room temperature, the reaction solution was poured into 100 ml of asaturated aqueous sodium hydrogen carbonate solution. The organic phasewas separated, the aqueous phase was extracted with 100 ml of ethylacetate three times, the resulting organic phase was mixed with theprevious organic phase, and the mixed one was dried over anhydroussodium sulfate. Purification was performed through a silica gel columnto obtain 2.27 g (yield 61.4%) of a yellow oil of3-(5-methyl-2-furyl)-6-hydrocyclopenta[1,2-b]thiophene. Sodium sulfatewas filtered, the solution was subjected to removal by distillationunder reduced pressure, and purification was performed through a silicagel column to obtain 1.80 g (yield 39.1%) of a yellow oil of3-phenyl-4-methyl-6-hydrocyclopenta[1,2-b]thiophene.

(4-2) Synthesis of(3-phenyl-4-methyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane

After 3.70 g (17.43 mmol) of3-phenyl-4-methyl-6-hydrocyclopenta[1,2-b]thiophene and 50 ml of THFwere added to a 100 ml flask under nitrogen to form a solution, it wascooled to −78° C. and 8.37 ml (20.9 mmol) of an n-butyllithium/hexanesolution (2.5M) was added, followed by stirring at 10° C. for 3 hours.The whole was again cooled to −78° C. and 4.50 g (34.86 mmol) ofdimethyldichlorosilane was quickly added, followed by stirring at 10° C.for 12 hours. By removing volatile matter by distillation under reducedpressure, 5.31 g of a pale yellow oil was obtained. To the pale yellowoil was added 60 ml of THF, thus forming a solution, and 9.14 ml (18.3mmol) of a sodium cyclopentadienylide/THF solution (2M) was addedthereto at −78° C. The whole was stirred at 10° C. for 2 hours, thereaction product was added to 50 ml of ice water, and the organic phasewas separated. The aqueous phase was extracted with 100 ml of ethylacetate twice, the resulting organic phase was mixed with the previousorganic phase, and the mixed on was dried over anhydrous sodium sulfate.Sodium sulfate was filtered, the solution was subjected to removal bydistillation under reduced pressure, and purification was performedthrough a silica gel column to obtain 2.20 g (yield 32.1%) of a paleyellow oil of(3-phenyl-4-methyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane.

(4-3) Synthesis ofdimethylsilylene(3-phenyl-4-methyl-cyclopento[2,3-b]thiophen-6-yl)(cyclopentadienyl)zirconiumdichloride

To a 200 ml flask were added 2.20 g (6.58 mmol) of(3-phenyl-4-methyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilaneand 50 ml of diethyl ether under nitrogen, followed by cooling to −78°C. Thereto was added dropwise 5.53 ml (13.8 mmol) of ann-butyllithium/n-hexane solution (2.5M), followed by stirring at 10° C.for 3 hours. The solvent of the reaction solution was removed bydistillation under reduced pressure, 70 ml of dichloromethane was addedthereto, and the whole was cooled to −78° C. Thereto was added 1.69 g(7.24 mmol) of zirconium tetrachloride, the temperature was raised to10° C. over a period of 3 hours, and the whole was further stirred at10° C. overnight. The reaction solution was filtered and the solvent wasremoved by distillation from the resulting filtrate under reducedpressure, thereby obtaining a yellow solid. The solid was washed with amixed solvent of 11 ml of toluene and 4 ml of n-pentane and then driedunder reduced pressure, thereby obtaining 1.40 g (yield 43.0%) of a palegreen solid ofdimethylsilylene(3-phenyl-4-methyl-cyclopento[2,3-b]thiophen-6-yl)(cyclopentadienyl)zirconiumdichloride.

¹H-NMR values (CDCl₃): δ 0.80 (s, 3H), δ 0.90 (s, 3H), δ 2.17 (s, 3H), δ5.62 (s, 1H), δ 5.81 (q, 1H), δ 5.94 (q, 1H), δ 6.95 (m, 1H), δ 7.01 (m,1H), δ 7.28 (s, 1H), δ 7.36-7.40 (m, 3H), δ 7.49 (d, 2H).

(5) Synthesis of Metallocene Compound E:dimethylsilylene(3-(5-methyl-2-phenyl)-4-methyl-cyclopento[2,3-b]thiophene-6-yl)(cyclopentadienyl)zirconiumdichloride (5-1) Synthesis of 3-acetyl-4-bromothiophene

Under nitrogen, 40.00 g (165.34 mmol) of 3,4-dibromothiophene and 200 mlof diethyl ether were added to a 500 ml flask, and 66.14 ml (165.4 mmol)of an n-butyllithium/n-hexane solution (2.5M) was slowly added dropwisethereto at −78° C., followed by stirring still at −78° C. for 30minutes. Subsequently, 20.46 g (198.41 mmol) ofN-methoxy-N-methyl-acetamide was added thereto at −78° C. and the wholewas stirred at 20° C. for 12 hours. The reaction solution was adjustedto pH=7 with 2N hydrochloric acid and extracted with 100 ml of ethylacetate three times. The organic phase was washed with 100 ml of waterand dried over anhydrous sodium sulfate. Sodium sulfate was filtered,the solution was subjected to removal by distillation under reducedpressure, and purification was performed through a silica gel column toobtain 19.0 g (yield 56.0%) of a pale yellow oil of3-acetyl-4-bromothiophene.

(5-2) Synthesis of ethyl 3-(4-bromo-3-thienyl)-3-hydroxybutyrate

Under nitrogen, 22.96 g (351.10 mmol) of zinc and 180 ml of THF wereadded to a 500 ml flask, and 3.18 g (29.26 mmol) of trimethylsilylchloride was added thereto at 20° C., followed by stirring at 30minutes. The mixture was heated to 40° C., 29.32 g (175.55 mmol) ofethyl bromoacetate was slowly added thereto, and the whole was stirredat 40° C. for 2 hours to obtain a brown suspension. Under nitrogen,30.00 g (146.29 mmol) of 3-acetyl-4-bromothiophene and 80 ml of THF wereadded to a 500 ml flask prepared separately, and the previous brownsuspension was slowly added thereto at 66° C., followed by stirringstill at 66° C. for 6 hours. The reaction solution was poured into 400ml of ice water and extracted with 200 ml of ethyl acetate twice. Theorganic phase was washed with 100 ml of water three times and dried overanhydrous sodium sulfate. Sodium sulfate was filtered and the solutionwas subjected to removal by distillation under reduced pressure toobtain 40.00 g of a brown oil of ethyl3-(4-bromo-3-thienyl)-3-hydroxybutyrate.

(5-3) Synthesis of ethyl 3-(4-bromo-3-thienyl)-butyrate

Under nitrogen, 40.00 (136.43 mmol) of ethyl3-(4-bromo-3-thienyl)-3-hydroxybutyrate, 19.04 g (163.72 mmol) oftriethylsilane, and 308.02 g (2.70 mol) of trifluoroacetic acid wereadded to a 1000 ml flask, followed by stirring at 71° C. for 4 hours.The resulting solution was concentrated and the concentrate wasdissolved in 500 ml of ethyl acetate, and the reaction solution wasadjusted to pH=7 with an aqueous sodium carbonate solution. The organiclayer was separated, washed with 100 ml of water three times, and driedover anhydrous sodium sulfate. Sodium sulfate was filtered and thesolution was subjected to removal by distillation under reduced pressureto obtain 55.00 g of a brown oil of ethyl3-(4-bromo-3-thienyl)-butyrate.

(5-4) Synthesis of 3-(4-bromo-3-thienyl)-butyric acid

Under nitrogen, 50.00 g (180.39 mmol) of ethyl3-(4-bromo-3-thienyl)-butyrate and 300 ml of ethanol were added to a1000 ml flask, and 40.49 g (721.56 mmol) of potassium hydroxide wasadded thereto at 20° C., followed by stirring at 78° C. for 12 hours.The reaction solution was concentrated, 300 ml of water was added, andextraction with 100 ml of ethyl acetate was performed three times. Theaqueous phase was adjusted to pH=3 with 6N hydrochloric acid andextracted with 200 ml of dichloromethance three times. The organic phasewas dried over anhydrous sodium sulfate. Sodium sulfate was filtered andthe solution was subjected to removal by distillation under reducedpressure to obtain 25.00 g of a brown oil of3-(4-bromo-3-thienyl)-butyric acid.

(5-5) Synthesis of 3-bromo-4-methyl-cyclopenteno[2,3-b]thiophen-6-one

Under nitrogen, 30.00 g (120.42 mmol) of 3-(4-bromo-3-thienyl)-butyricacid was added to a 500 ml flask, and 246.00 g (2.07 mol) of thionylchloride was added thereto at 20° C. The mixture was stirred at 76° C.for 3 hours and unreacted thionyl chloride was removed by distillationunder reduced pressure. Subsequently, 200 ml of dichloromethane wasadded and 19.14 g (143.51 mmol) of aluminum chloride was added at 0° C.,followed by stirring at 20° C. for 2 hours. The reaction solution waspoured into 200 ml of ice water and extraction was performed with 200 mlof dichloromethane three times. The organic phase was washed with 100 mlof water three times and dried over anhydrous sodium sulfate. Sodiumsulfate was filtered and the solution was subjected to removal bydistillation under reduced pressure to obtain 24.50 g of a brown oil of3-bromo-4-methyl-cyclopenteno[2,3-b]thiophen-6-one.

(5-6) Synthesis of3-(5-methyl-2-furyl)-4-methyl-cyclopenteno[2,3-b]thiophen-6-one

After 13.50 (58.41 mmol) of3-bromo-4-methyl-cyclopenteno[2,3-b]thiophen-6-one, 671.77 mg (1.17mmol) of Pd(dba)₂, 1.23 g (4.67 mmol) of triphenylphosphine, and 250 mlof toluene were added to a 500 ml flask under nitrogen, 26.02 g (70.10mmol) of tri(n-butyl)(5-methyl-2-furyl)tin prepared separately was addedthereto, followed by stirring at 110° C. for 12 hours. The reactionsolution was poured into 400 ml of a 5% aqueous potassium fluoridesolution and extraction with 200 ml of ethyl acetate was performed threetimes. After washing with 100 ml of water three times, the organic phasewas dried over anhydrous sodium sulfate. Sodium sulfate was filtered,the solution was subjected to removal by distillation under reducedpressure, and purification was performed through a silica gel column toobtain 9.30 g (yield 68.54%) of a pale yellow oil of3-(5-methyl-2-furyl)-4-methyl-cyclopenteno[2,3-b]thiophen-6-one.

(5-7) Synthesis of3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[1,2-b]thiophene

Under nitrogen, 5.00 (21.52 mmol) of3-(5-methyl-2-furyl)-4-methyl-cyclopenteno[2,3-b]thiophen-6-one and 40ml of ethanol were added to a 100 ml flask, and 4.81 g (25.82 mmol) of4-methylbenzenesulfonohydrazide and 1.02 g (5.38 mmol) oftoluenesulfonic acid monohydrate were added thereto at 20° C. Themixture was stirred at 78° C. for 18 hours to obtain a yellowsuspension. A yellow solid was recovered by filtering, washed with 10 mlof ethanol twice, and then dried under reduced pressure to obtain 4.6 gof the yellow solid. This reaction was carried out once more to obtain6.8 g of the yellow solid in total.

Under nitrogen, 5.00 g of the obtained yellow solid and 60 ml of THFwere added to a 200 ml flask, and 12.48 ml (31.20 mmol) of ann-butyllithium/n-hexane solution (2.5M) was added dropwise at −78° C.,followed by stirring at 66° C. for 1 hour. The reaction solution waspoured into 80 ml of ice water, extraction with 60 ml of ethyl acetatewas performed three times, and the resulting organic phase was driedover anhydrous sodium sulfate. Sodium sulfate was filtered, the solutionwas subjected to removal by distillation under reduced pressure, andpurification was performed through a silica gel column to obtain 1,60 g(yield 59.3%) of a yellow oil of3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[2,3-b]thiophene.

(5-8) Synthesis of (3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl) dimethylsilane

Under nitrogen, 2.00 g (9.25 mmol) of3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[1,2-b]thiophene and 20ml of THF were added to a 100 ml flask, the whole was cooled to −78° C.,and 4.07 ml (10.18 mmol) of an n-butyllithium/hexane solution (2.5M) wasadded, followed by stirring at 20° C. for 3 hours. Subsequently, 15.19ml (10.18 mmol) of a cyclopentadienyldimethylsilyl chloride/hexanesolution (0.67M) was slowly added thereto at −78° C., and the whole wasstirred at 20° C. for 1.5 hours. The reaction solution was poured into150 ml of ice water and extracted with 100 ml of ethyl acetate fourtimes. The organic phase was washed with a saturated aqueous sodiumchloride solution and dried over anhydrous sodium sulfate. Sodiumsulfate was filtered, the solution was subjected to removal bydistillation under reduced pressure, and purification was performedthrough a silica gel column to obtain 1.46 g 46.6%) of a yellow oil of(3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane.

(5-9) Synthesis ofdimethylsilylene(3-(5-methyl-2-furyl)-4-methyl-cyclopento[2,3-b]thiophen-6-yl)(cyclopentadienyl)zirconiumdichloride

Under nitrogen, 1.46 g (4.31 mmol) of(3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(cyclopentadienyl)dimethylsilane and 20 ml of diethyl ether were added to a 200 ml flask,followed by cooling to −78° C. Thereto was added dropwise 3.62 ml (9.05mmol) of an n-butyllithium/n-hexane solution (2.5M), followed bystirring at 20° C. for 3 hours. The solvent of the reaction solution wasremoved by distillation under reduced pressure, 55 ml of dichloromethanewas added thereto, and the whole was cooled to −78° C. Thereto was added1.10 g (4.74 mmol) of zirconium tetrachloride, the temperature wasraised to 20° C. over a period of 3 hours, and the whole was furtherstirred at 20° C. overnight. The reaction solution was filtered and thesolvent was removed by distillation from the resulting filtrate underreduced pressure, thereby obtaining a brown powder. The powder waswashed with a mixed solvent of 5 ml of toluene and 10 ml of n-pentaneand further extracted with 100 ml of toluene to remove insoluble matter.The resulting toluene solution was subjected to removal by distillationunder reduced pressure, thereby obtaining 207 mg (yield 9.67%) of agreen solid ofdimethylsilylene(3-(5-methyl-2-furyl)-4-methyl-cyclopento[2,3-b]thiophen-6-yl)(cyclopentadienyl)zirconiumdichloride.

¹H-NMR values (CDCl₃): δ 0.80 (s, 3H), δ 0.89 (s, 3H), δ 2.35 (s, 3H), δ2.49 (s, 3H), δ 5.65 (s, 1H), δ 5.81-5.83 (m, 1H), δ 5.91-5.93 (m, 1H),δ 6.03-6.05 (m, 1H), δ 6.45 (d, 1H), δ 6.91-6.94 (m, 1H), δ 6.96-6.99(m, 1H), δ 7.47 (s, 1H).

(6) Synthesis of Metallocene Compound F:dimethylsilylene(3-(5-methyl-2-phenyl)-4-methyl-cyclopento[2,3-b]thiophene-6-yl)(2,3,4,5-tetramethylcyclopentadienyl)zirconiumdichloride (6-1) Synthesis of(3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(2,3,4,5-tetramethylcyclopentadienyl)dimethylsilane

Under nitrogen, 2.50 g (11.56 mmol) of3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[1,2-b]thiophene obtainedin (5-7) of (5) Synthesis of metallocene compound E and 40 ml of THFwere added to a 100 ml flask, the whole was cooled to −78° C., and 5.78ml (14.45 mmol) of an n-butyllithium/hexane solution (2.5M) was added,followed by stirring at 20° C. for 3 hours. Subsequently, 22.94 ml(15.37 mmol) of a cyclopentadienyldimethylsilyl chloride/hexane solution(0.67M) was slowly added thereto at −78° C., and the whole was stirredat 20° C. for 1.5 hours. The reaction solution was poured into 150 ml ofice water and extracted with 150 ml of ethyl acetate three times. Theorganic phase was washed with a saturated aqueous sodium chloridesolution and dried over anhydrous sodium sulfate. Sodium sulfate wasfiltered, the solution was subjected to removal by distillation underreduced pressure, and purification was performed through a silica gelcolumn to obtain 2.48 g (yield 54.4%) of a yellow oil of(3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(2,3,4,5-tetramethylcyclopentadienyl)dimethylsilane.

(6-2) Synthesis ofdimethylsilylene(3-(5-methyl-2-furyl)-4-methyl-cyclopento[2,3-b]thiophen-6-yl)(2,3,4,5-tetramethylcyclopentadienyl)zirconiumdichloride

Under nitrogen, 1.06 g (2.69 mmol) of(3-(5-methyl-2-furyl)-4-methyl-6-hydrocyclopenta[2,3-b]thiophen-6-yl)(2,3,4,5-tetramethylcyclopentadienyl)dimethylsilaneand 20 ml of diethyl ether were added to a 100 ml flask, followed bycooling to −78° C. Thereto was added dropwise 2.64 ml (6.60 mmol) of ann-butyllithium/n-hexane solution (2.5M), followed by stirring at 20° C.for 3 hours. The solvent of the reaction solution was removed bydistillation under reduced pressure, 40 ml of dichloromethane was addedthereto, and the whole was cooled to −78° C. Thereto was added 689.57 mg(2.96 mmol) of zirconium tetrachloride, the temperature was raised to20° C. over a period of 3 hours, and the whole was further stirred at20° C. overnight. The reaction solution was filtered and the solvent wasremoved by distillation from the resulting filtrate under reducedpressure, thereby obtaining a yellow powder. The powder was washed witha mixed solvent of 15 ml of toluene and 25 ml of n-pentane and furtherextracted with 150 ml of toluene to remove insoluble matter. Theresulting toluene solution was subjected to removal by distillationunder reduced pressure, thereby obtaining 409 mg (yield 27.4%) of ayellow solid ofdimethylsilylene(3-(5-methyl-2-furyl)-4-methyl-cyclopento[2,3-b]thiophen-6-yl)(2,3,4,5-tetramethylcyclopentadienyl)zirconiumdichloride.

¹H-NMR values (CDCl₃): δ 0.90 (s, 3H), δ 1.02 (s, 3H), δ 1.93 (s, 3H), δ2.00 (s, 3H), δ 2.05 (s, 3H), δ 2.08 (s, 3H), δ 2.35 (s, 3H), δ 2.48 (s,3H), δ 5.33 (s, 1H), δ 6.02 (s, 1H), δ 6.39 (s, 1H), δ 7.44 (s, 1H).

(7) Synthesis of Metallocene Compound G:dimethylsilylene(2,5-dimethyl-cyclopento[2,3-b]thiophene-6-yl)(cyclopentadienyl)zirconiumdichloride (7-1) Synthesis of2,5-dimethyl-cyclopenteno[2,3-b]thiophen-4-one

To a 300 ml flask was added 152.04 g (638.69 mmol) of the Eaton reagent,and a mixture of 10.00 g (101.86 mmol) of 2-methylthiophene and 10.52 g(122.24 mmol) of methacrylic acid was added thereto at 78 to 83° C. overa period of 30 minutes. After the mixture was stirred at 80° C. for 5minutes, it was gradually poured into 200 ml of ice water and extractionwas performed with 300 ml of dichloromethane. The organic phase wasseparated and the aqueous phase was extracted with 300 ml ofdichloromethane twice. The resulting organic phases were combined andthe combined one was washed with 300 ml of a saturated aqueous sodiumcarbonate solution twice and dried over anhydrous sodium sulfate. Sodiumsulfate was filtered, the solution was subjected to removal bydistillation under reduced pressure, and purification was performedthrough a silica gel column to obtain 4.90 g (yield 28%) of a yellowliquid of 2,5-dimethyl-cyclopenteno[2,3-b]thiophen-4-one.

(7-2) Synthesis of 2,5-dimethyl-6-hydrocyclopenta[1,2-b]thiophene

Under nitrogen, 4.90 g (29.48 mmol) of2,5-dimethyl-cyclopenteno[2,3-b]thiophen-4-one and 50 ml of anhydrousTHF were added to a 100 ml flask, and 1.34 g (35.38 mmol) of lithiumaluminum hydride was added thereto at 0° C. After the mixture wasstirred at 15° C. for 2 hours, the reaction product was slowly pouredinto 100 ml of ice water and extracted with 300 ml of ethyl acetatetwice. The resulting organic phase was dried over anhydrous sodiumsulfate. Sodium sulfate was filtered and the solution was subjected toremoval by distillation under reduced pressure to obtain 4.44 g of ayellow solid.

Under nitrogen, 780 mg of the above yellow solid and 15 ml of toluenewere added to a 50 ml flask, and 44.13 mg (232.00 μmol) ofp-toluenesulfonic acid monohydrate and 9.57 mg (46.40 μmol) of2,6-di-t-butylphenol were added thereto. After the mixture was stirredat 110° C. for 10 minutes, the temperature was returned to roomtemperature and the mixture was washed with 50 ml of a saturated aqueoussodium carbonate solution and 50 ml of water, respectively. Theresulting organic phase was dried over anhydrous sodium sulfate. Sodiumsulfate was filtered, the solution was subjected to removal bydistillation under reduced pressure, and purification was performedthrough a silica gel column to obtain 460.00 mg (yield 66%) of a yellowoil of 2,5-dimethyl-6-hydrocyclopenta[1,2-b]thiophene.

(7-3) Synthesis of(2,5-dimethyl-4-hydrocyclopenta[2,3-b]thiophen-4-yl)(cyclopentadienyl)dimethylsilane

After 2.06 g (13.71 mmol) of2,5-dimethyl-6-hydrocyclopenta[1,2-b]thiophene and 30 ml of THF wereadded to a 100 ml flask under nitrogen to form a solution, it was cooledto −78° C. and 6.58 ml (16.5 mmol) of an n-butyllithium/hexane solution(2.5M) was added, followed by stirring at 15° C. for 3 hours. To a 100ml flask prepared separately were added 3.54 g (27.42 mmol) ofdimethyldichlorosilane and 10 ml of THF, and the whole was cooled to−78° C. and the previous reaction solution was added thereto. After thewhole was stirred at 10° C. for 12 hours, 3.33 g of a yellow oil wasobtained by removing volatile matter by distillation under reducedpressure. To 2.57 g of the yellow oil was added 30 ml of THF, thusforming a solution, and 6.18 ml (12.4 mmol) of a sodiumcyclopentadienylide/THF solution (2M) was added thereto at −78° C. Thewhole was stirred at 15° C. for 2 hours. The reaction product was addedto 50 ml of ice water and the organic phase was separated. The aqueousphase was extracted with 100 ml of ethyl acetate twice, the resultingorganic phase was mixed with the previous organic phase, and the mixedone was dried over anhydrous sodium sulfate. Sodium sulfate wasfiltered, the solution was subjected to removal by distillation underreduced pressure, and purification was performed through a silica gelcolumn to obtain 1.76 g (yield 57.6%) of a yellow oil of(2,5-dimethyl-4-hydrocyclopenta[2,3-b]thiophen-4-yl)(cyclopentadienyl)dimethylsilane.

(7-4) Synthesis ofdimethylsilylene(2,5-dimethyl-cyclopento[2,3-b]thiophen-4-yl)(cyclopentadienyl)zirconiumdichloride

To a 2.00 ml flask were added 2.40 g (8.81 mmol) of(2,5-dimethyl-4-hydrocyclopenta[2,3-b]thiophen-4-yl)(cyclopentadienyl)dimethylsilaneand 30 ml of diethyl ether under nitrogen, followed by cooling to −78°C. Thereto was added dropwise 7.40 ml (18.5 mmol) of ann-butyllithium/n-hexane solution (2.5M), followed by stirring at 15° C.for 3 hours.

The solvent of the reaction solution was removed by distillation underreduced pressure to obtain 2.50 g of a yellow solid. To 1.95 g (6.86mmol) of the yellow solid was added 80 ml of dichloromethane, and thewhole was cooled to −78° C. Thereto was added 1.68 g (7.20 mmol) ofzirconium tetrachloride, the temperature was raised to 20° C. over aperiod of 3 hours, and the whole was further stirred at 20° C.overnight. The reaction solution was filtered and the solvent wasremoved by distillation from the resulting filtrate under reducedpressure, thereby obtaining a yellow powder. The powder was extractedwith a mixed solvent of 34 ml of toluene and 11 ml of n-pentane toremove insoluble matter. The resulting solution was subjected to removalby distillation under reduced pressure, thereby obtaining a yellowishgreen solid. Further, the solid was extracted with 50 ml ofdichloromethane and the resulting solution was subjected to removal bydistillation under reduced pressure, thereby obtaining 0.92 g (yield31%) of a yellowish green solid ofdimethylsilylene(2,5-dimethyl-cyclopento[2,3-b]thiophen-4-yl)(cyclopentadienyl)zirconiumdichloride.

¹H-NMR values (CDCl₃): δ 0.905 (s, 3H), δ 0.913 (s, 3H), δ 2.23 (s, 3H),δ 2.45 (s, 3H), δ 5.69 (m, 1H), δ 5.97 (m, 1H), δ 6.43 (s, 1H), δ 6.55(s, 1H), δ 6.87 (m, 1H), δ 6.95 (m, 1H).

(8) Synthesis of Metallocene Compound H:dimethylsilylene(4-phenyl-indenyl-1-yl)(cyclopentadienyl)zirconiumdichloride

As for the synthesis ofdimethylsilylene(4-phenyl-indenyl-1-yl)(cyclopentadienyl)zirconiumdichloride, it was synthesized according to the procedure described inExamples (Synthetic Example 5) of JP-A-2011-137146.

Example 1 (1) Preparation of Solid Catalyst

Under a nitrogen atmosphere, 5 g of silica calcined at 600° C. for 5hours was placed in a 200 ml two-neck flask and was dried under reducedpressure for 1 hour by means of a vacuum pump while heating on an oilbath at 150° C. in a 100 ml two-neck flask prepared separately wasplaced 64 mg of the metallocene compound A under a nitrogen atmosphere,and the compound was dissolved in 13.4 ml of dehydrated toluene. At roomtemperature, 8.6 ml of a 20% methylaluminoxane/toluene solutionmanufactured by Albemarle Corporation was added to the toluene solutionof the metallocene compound A, followed by stirring for 30 minutes.While the 200 ml two-neck flask containing vacuum-dried silica placedtherein was heated and stirred on an oil bath at 40° C., all the amountof the toluene solution of the reaction product of the metallocenecompound A and methylaluminoxane was added thereto. After the whole wasstirred at 40° C. for 1 hour, the toluene solvent was removed bydistillation still under heating at 40° C., thereby obtaining a solidcatalyst.

(2) Production of Ethylene-1-Butene Copolymer

An ethylene-1-butene copolymer was produced using the solid catalystobtained in (1) Preparation of Solid Catalyst of the above Example 1.

That is, after 500 ml of thoroughly dehydrated and deoxygenated heptane,57 mg of triethylaluminum, and 34 ml of hydrogen at normal pressure wereintroduced into a stainless steel-made autoclave having stirring andtemperature-controlling devices and an internal volume of 1 liter, thetemperature was raised to 7.5° C. while stirring. Ethylene containing1-butene in a ratio of 5% by mol relative to ethylene was introduceduntil partial pressure thereof reached 1.4 MPa, 10 ml of a heptaneslurry of 0.100 g of the above solid catalyst was pressed therein withan argon gas, and polymerization was continued for 60 minutes whilemaintaining an ethylene partial pressure of 1.4 MPa and a temperature of75° C.

As a result, 23.6 g of an ethylene-1-butene copolymer was formed. MFR ofthe resulting copolymer was 0.05 g/10 minutes. Polymerization conditionsare summarized in Table 6 and Polymerization results are summarized inTable 7.

Example 2

An ethylene-1-butene copolymer was produced in the same manner as inExample 1 except that 0.100 g of the solid catalyst obtained in Example1 was used and 68 ml of hydrogen was introduced at normal pressurebefore ethylene containing 10% by weight of 1-butene was introduced.

As a result, 25.2 g of an ethylene-1-butene copolymer was formed. MFR ofthe resulting copolymer was 0.35 g/10 minutes. Polymerization conditionsare summarized in Table 6 and Polymerization results are summarized inTable 7.

TABLE 6 Catalyst Amount Component (A) Component (B) Component (C) ofsolid Metallocene Amount Amount Amount catalyst Example Compound (mmol)Compound (mmol) Compound (g) (g) 1 A 0.00193 MAO 0.39 silica 0.077 0.1002 A 0.00193 MAO 0.39 silica 0.077 0.100 Polymerization conditions C2Polymer- Hydrogen partial ization TEA H2/C2 Temperature pressure TimeExample (mmol) Solvent (%) Comonomer (° C.) (MPa) (minute) 1 0.50heptane 0.185 C4/C2 = 75 1.4 60 5.0 mol % 2 0.50 heptane 0.321 C4/C2 =75 1.4 60 5.0 mol %

TABLE 7 Results Activity MFR g′ Yield (g-PE/ (g/ Mw × g_(a)′ g_(b)′Example (g) g-Cat/hr) 10 minutes) FR 10⁴ Mw/Mn value value 1 23.6 2360.05 18.3 14.6 3.6 0.93 0.67 2 25.2 252 0.35 14.1 10.9 3.7 0.94 0.67

Example 3

An ethylene-1-butene copolymer was produced using the solid catalystobtained in (1) Preparation of Solid Catalyst of the above Example 1.

That is, after 800 ml of thoroughly dehydrated and deoxygenatedisobutane, 34 mg of triethylaluminum, 6483 ml of hydrogen diluted withnitrogen at a concentration of 5% at normal pressure, and 10 ml of1-butene at 0.6 MPa were introduced into a stainless steel-madeautoclave having stirring and temperature-controlling devices and aninternal volume of 1.5 liters, the temperature was raised to 75° C.while stirring. Ethylene was introduced until partial pressure thereofreached 1.4 MPa, 0.093 g of the above solid catalyst was pressed thereinwith a nitrogen gas, and polymerization was continued for 60 minuteswhile maintaining an ethylene partial pressure of 1.4 MPa and atemperature of 75° C.

As a result, 108.0 g of an ethylene-1-butene copolymer was formed. MFRof the resulting copolymer was 0.20 g/10 minutes. Polymerizationconditions are summarized in Table 8 and Polymerization results aresummarized in Table 9.

Example 4 (1) Preparation of Solid Catalyst

A solid catalyst was prepared in the same manner as in (1) Preparationof Solid Catalyst of (Example 1) except that 60 mg of the metallocenecompound B was used instead of the metallocene compound A.

(2) Production of Ethylene-1-Butene Copolymer

An ethylene-1-butene copolymer was produced using the solid catalystobtained in (1) Preparation of Solid Catalyst of the above Example 4.

An ethylene-1-butene copolymer was produced in the same manner as inExample 3 except that 0.209 g of the solid catalyst obtained in (1)Preparation of Solid Catalyst of Example 4 was used, 30 ml of 1-butenewas introduced at 0.6 MPa, and hydrogen was not introduced.

As a result, 53.3 g of an ethylene-1-butene copolymer was formed. MFR ofthe resulting copolymer was 3.55 g/10 minutes. Polymerization conditionsare summarized in Table 8 and Polymerization results are summarized inTable 9.

Example 5 (1) Preparation of Solid Catalyst

A solid catalyst was prepared in the same manner as in (1) Preparationof Solid Catalyst of (Example 1) except that 61 mg of the metallocenecompound C was used instead of the metallocene compound A.

(2) Production of Ethylene-1-Butene Copolymer

An ethylene-1-butene copolymer was produced using the solid catalystobtained in (1) Preparation of Solid Catalyst of the above Example 5.

An ethylene-1-butene copolymer was produced in the same manner as inExample 3 except that 0.179 g of the solid catalyst obtained in (1)Preparation of Solid Catalyst of Example 5 was used, 30 ml of 1-butenewas introduced at 0.6 MPa, and hydrogen was not introduced.

As a result, 30.4 g of an ethylene-1-butene copolymer was formed. MFR ofthe resulting copolymer was 2.11 g/10 minutes. Polymerization conditionsare summarized in Table 8 and Polymerization results are summarized inTable 9.

Example 6 (1) Preparation of Solid Catalyst

A solid catalyst was prepared in the same manner as in (1) Preparationof Solid Catalyst of (Example 1) except that 62 mg of the metallocenecompound D was used instead of the metallocene compound A.

(2) Production of Ethylene-1-Butene Copolymer

An ethylene-1-butene copolymer was produced using the solid catalystobtained in (1) Preparation of Solid Catalyst of the above Example 6.

An ethylene-1-butene copolymer was produced in the same manner as inExample 3 except that 0.062 g of the solid catalyst obtained in (1)Preparation of Solid Catalyst of Example 6 was used, 70 ml of 1-butenewas introduced at 0.6 MPa, and 540 ml of hydrogen diluted with nitrogenat a concentration of 5% was introduced at normal pressure.

As a result, 40.0 g of an ethylene-1-butene copolymer was formed. MFR ofthe resulting copolymer was 0.12 g/10 minutes. Polymerization conditionsare summarized in Table 8 and Polymerization results are summarized inTable 9.

Example 7 (1) Preparation of Solid Catalyst

A solid catalyst was prepared in the same manner as in (1) Preparationof Solid Catalyst of (Example 1) except that 62 mg of the metallocenecompound E was used instead of the metallocene compound A.

(2) Production of Ethylene-1-Butene Copolymer

An ethylene-1-butene copolymer was produced using the solid catalystobtained in (1) Preparation of Solid Catalyst of the above Example 7.

An ethylene-1-butene copolymer was produced in the same manner as inExample 3 except that 0.069 g of the solid catalyst obtained in (1)Preparation of Solid Catalyst of Example 7 was used, 70 ml of 1-butenewas introduced at 0.6 MPa, and 550 ml of hydrogen diluted with nitrogenat a concentration of 5% was introduced at normal pressure.

As a result, 5.6 g of an ethylene-1-butene copolymer was formed. MFR ofthe resulting copolymer was 0.24 g/10 minutes. Polymerization conditionsare summarized in Table 8 and Polymerization results are summarized inTable 9.

Example 8 (1) Preparation of Solid Catalyst

A solid catalyst was prepared in the same manner as in (1) Preparationof Solid Catalyst of (Example) except that 69 mg of the metallocenecompound F was used instead of the metallocene compound A.

(2) Production of Ethylene-1-Butene Copolymer

An ethylene-1-butene copolymer was produced using the solid catalystobtained in (1) Preparation of Solid Catalyst of the above Example 8.

An ethylene-1-butene copolymer was produced in the same manner as inExample 3 except that 0.038 g of the solid catalyst obtained in Example8 was used, 70 ml of 1-butene was introduced at 0.6 MPa, and 1958 ml ofhydrogen diluted with nitrogen at a concentration of 5% was introducedat normal pressure.

As a result, 92.2 g of an ethylene-1-butene copolymer was formed. MFR ofthe resulting copolymer was 0.10 g/10 minutes. Polymerization conditionsare summarized in Table 8 and Polymerization results are summarized inTable 9.

Comparative Example 1 (1) Preparation of Solid Catalyst

A solid catalyst was prepared in the same manner as in (1) Preparationof Solid Catalyst of (Example 1) except that 54 mg of the metallocenecompound G was used instead of the metallocene compound A.

(2) Production of Ethylene-1-Butene Copolymer

An ethylene-1-butene copolymer was produced using the solid catalystobtained in (1) Preparation of Solid Catalyst of the above ComparativeExample 1.

An ethylene-1-butene copolymer was produced in the same manner as inExample 3 except that 0.108 g of the solid catalyst obtained in (1)Preparation of Solid Catalyst of Comparative Example 1 was used, 10 mlof 1-butene was introduced at 0.6 MPa, and 6012 ml of hydrogen dilutedwith nitrogen at a concentration of 5% was introduced at normalpressure.

As a result, 38.0 g of an ethylene-1-butene copolymer was formed. MFR ofthe resulting copolymer was 1.87 g/10 minutes. Polymerization conditionsare summarized in Table 8 and Polymerization results are summarized inTable 9.

Comparative Example 2 (1) Preparation of Solid Catalyst

A solid catalyst was prepared in the same manner as in (1) Preparationof Solid Catalyst of (Example 1) except that 51 mg of the metallocenecompound H was used instead of the metallocene compound A.

(2) Production of Ethylene-1-Butene Copolymer

An ethylene-1-butene copolymer was produced using, the solid catalystobtained in (1) Preparation of Solid Catalyst of the above ComparativeExample 2.

An ethylene-1-butene copolymer was produced in the same manner as inExample 1 except that 0.200 g of the solid catalyst obtained in (1)Preparation of Solid Catalyst of Comparative Example 2 was used and 65ml of hydrogen was introduced at normal pressure before ethylenecontaining 10% by weight of 1-butene was introduced.

As a result, 17.0 g of an ethylene-1-butene copolymer was formed. MFR ofthe resulting copolymer was 0.54 g/10 minutes. Polymerization conditionsare summarized in Table 8 and Polymerization results are summarized inTable 9.

TABLE 8 Catalyst Amount of Component (A) Component (B) Component (C)solid Metallocene Amount Amount Amount catalyst Example Compound (mmol)Compound (mmol) Compound (g) (g) 3 A 0.00178 MAO 0.36 silica 0.071 0.0934 B 0.00403 MAO 0.81 silica 0.161 0.209 5 C 0.00345 MAO 0.69 silica0.0138 0.179 6 D 0.00119 MAO 0.24 silica 0.048 0.062 7 E 0.00133 MAO0.27 silica 0.053 0.069 8 F 0.00073 MAO 0.15 silica 0.029 0.038 C1 G0.00208 MAO 0.42 silica 0.083 0.108 C2 H 0.00386 MAO 0.77 silica 0.1540.200 Polymerization conditions C2 Polymer- Hydrogen partial ization TEAH2/C2 Temperature pressure Time Example (mmol) Solvent (%) Comonomer (°C.) (MPa) (minute) 3 0.30 isobutane 0.642 C4/10 ml 75 1.4 60 initialcharging 4 0.30 isobutane 0.063 C4/30 ml 75 1.4 60 initial charging 50.30 isobutane 0.075 C4/30 ml 75 1.4 60 initial charging 6 0.30isobutane 0.062 C4/70 ml 75 1.4 60 initial charging 7 0.30 isobutane0.049 C4/70 ml 75 1.4 60 initial charging 8 0.30 isobutane 0.139 C4/70ml 75 1.4 60 initial charging C1 0.30 isobutane 0.633 C4/10 ml 75 1.4 60initial charging C2 0.50 heptane 0.252 C4/C2 = 75 1.4 60 5.0 mol %

TABLE 9 Results Activity MFR g′ Yield (g-PE/ (g/ Mw × g_(a)′ g_(b)′Example (g) g-Cat/hr) 10 minutes) FR 10⁴ Mw/Mn value value 3 108.0 11530.20 23.4 10.7 3.9 0.89 — (0.59) 4 53.3 255 3.55 9.4 9.7 5.1 0.75 0.38 530.4 170 2.11 9.0 9.4 4.5 0.81 0.42 6 40.0 645 0.12 22.0 12.5 4.1 0.820.52 7 5.6 81 0.24 21.5 11.7 4.3 0.76 0.49 8 92.2 2459 0.10 20.8 10.43.4 0.85 0.63 C1 38.0 353 1.87 15.1 6.8 3.7 0.87 — (0.63) C2 17.0 850.54 16.5 10.4 5.1 0.86 — (0.60)

4. Evaluation

From Table 7, in Examples 1 and 2 where the catalysts containing ametallocene compound according to the present invention were used, theg_(a)′ values and g_(b)′ values of the resulting ethylene-based polymerswere 0.94 or less and 0.67, respectively, and thus it was revealed thatethylene-based polymers having long-chain branches introduced thereinwere obtained. With regard to the description of the g′ values, “-” wasdescribed in the case where any reliable g_(b)′ value was not obtained.Moreover, in the case where the minimum value of g′ was present betweenlogM=5 and logM=6, the minimum value was described in parentheses in thecolumn of g_(b)′.

Furthermore, from Table 9, it was shown that, in Examples 3 to 7 wherethe catalysts containing a metallocene compound according to the presentinvention were used, the g_(a)′ values of the resulting ethylene-basedpolymers are 0.76 to 0.89 and thus are equal to or lower than the g_(a)′values of Comparative Examples 1 and 2. The g_(b)′ values of theethylene-based polymers of Examples 3 to 7 were 0.38 to 0.59 and werelower than the g_(b)′ values of Comparative Examples 1 and 2, and thusit was revealed that ethylene-based polymers having more long-chainbranches introduced therein were obtained as compared with the cases ofthe metallocene compound having no substituent at the 3-position ofcyclopentathiophene (Comparative Example 1) and the metallocene compoundhaving indene instead of cyclopentathiophene (Comparative Example 2).The ethylene-based polymers are ethylene-based polymers having excellentbalance between elongation viscosity behavior and melt fluidity andhaving good molding processability. Furthermore, the g_(a)′ value andg_(b)′ value of the resulting ethylene-based polymer obtained in Example8 were equal to the values of Comparative Examples 1 and 2, but there isobtained a result that the polymerization activity is very high, andproductivity is also satisfactory.

While the invention has been described in detail and with reference tospecific embodiments thereof, it will be apparent to one skilled in theart that various changes and modifications can be made therein withoutdeparting from the spirit and scope thereof.

The present application is based on Japanese Patent Application No.2016-042853 filed on Mar. 4, 2016, and the contents are incorporatedherein by reference.

1. A metallocene compound represented by the following general formula(1):

wherein M¹ represents any transition metal of Ti, Zr, and Hf; X¹ and X²represent each independently a hydrogen atom, a halogen, a hydrocarbongroup having a carbon number of 1 to 20, an oxygen- ornitrogen-containing hydrocarbon group having a carbon number of 1 to 20,an amino group substituted with a hydrocarbon group having a carbonnumber of 1 to 20, or an alkoxy group having a carbon number of 1 to 20;Q¹ and Q² represent each independently a carbon atom, a silicon atom, ora germanium atom; R¹, R², R³, and R⁴ represent each independently ahydrogen atom or a hydrocarbon group having a carbon number of 1 to 10,and may form a ring together with at least one of Q¹ and Q² bondedthereto; m is 0 or 1 and, in the case of m is 0, Q¹ is directly bondedto a conjugated 5-membered ring containing R⁹ and R¹⁰; R⁵, R⁶, R⁷, R⁸,R⁹, R¹⁰, and R¹² represent each independently a hydrogen atom, ahalogen, a hydrocarbon group having a carbon number of 1 to 20, asilicon-containing hydrocarbon group having a carbon number of 1 to 18,which contains a silicon number of 1 to 6, a halogen-containinghydrocarbon group having a carbon number of 1 to 20, anoxygen-containing hydrocarbon group having a carbon number of 1 to 20,or a silyl group substituted with a hydrocarbon group having a carbonnumber of 1 to 20; and R¹¹ represents a substituted or unsubstitutedaryl group represented by the following general formula (1-a):

wherein Y¹ represents an atom of Group 14, 15, or 16 of the PeriodicTable; R¹³, R¹⁴, R¹⁵, R¹⁶, and R¹⁷ represent each independently ahydrogen atom, a halogen atom, a hydrocarbon group having a carbonnumber of 1 to 20, an oxygen- or nitrogen-containing hydrocarbon grouphaving a carbon number of 1 to 20, an amino group substituted with ahydrocarbon group having a carbon number of 1 to 20, an alkoxy grouphaving a carbon number of 1 to 20, a silicon-containing hydrocarbongroup having a carbon number of 1 to 18, which contains a silicon numberof 1 to 6, a halogen-containing hydrocarbon group having a carbon numberof 1 to 20, or a silyl group substituted with a hydrocarbon group havinga carbon number of 1 to 20, and adjacent substituents of R¹³, R¹⁴, R¹⁵,R¹⁶, and R¹⁷ may form a ring together with atoms bonded thereto; n is 0or 1 and, in case of n is 0, the substituent R¹³ is not present on Y¹; pis 0 or 1 and, in case of p is 0, the substituent R¹⁶ and the carbonatom to which R¹⁶ is bonded are not present and the carbon atom to whichR¹⁵ is bonded and the carbon atom to which R¹⁷ is bonded are directlybonded.
 2. A metallocene compound represented by the following generalformula (2):

wherein M¹ represents any transition metal of Ti, Zr, and Hf; X¹ and X²represent each independently a hydrogen atom, a halogen, a hydrocarbongroup having a carbon number of 1 to 20, an oxygen- ornitrogen-containing hydrocarbon group having a carbon number of 1 to 20,an amino group substituted with a hydrocarbon group having a carbonnumber of 1 to 20, or an alkoxy group having a carbon number of 1 to 20;Q¹ represents a carbon atom, a silicon atom, or a germanium atom; R¹ andR² represent each independently a hydrogen atom or a hydrocarbon grouphaving a carbon number of 1 to 10, and may form a ring together with Q¹bonded thereto; R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹² represent eachindependently a hydrogen atom, a halogen, a hydrocarbon group having acarbon number of 1 to 20, a silicon-containing hydrocarbon group havinga carbon number of 1 to 18, which contains a silicon number of 1 to 6, ahalogen-containing hydrocarbon group having a carbon number of 1 to 20,an oxygen-containing hydrocarbon group having a carbon number of 1 to20, or a silyl group substituted with a hydrocarbon group having acarbon number of 1 to 20; R¹⁸, R¹⁹, R²⁰, R²¹, and R²² represent eachindependently a hydrogen atom, a halogen atom, a hydrocarbon grouphaving a carbon number of 1 to 20, an oxygen- or nitrogen-containinghydrocarbon group having a carbon number of 1 to 20, an amino groupsubstituted with a hydrocarbon group having a carbon number of 1 to 20,an alkoxy group having a carbon number of 1 to 20, a silicon-containinghydrocarbon group having a carbon number of 1 to 18, which contains asilicon number of 1 to 6, a halogen-containing hydrocarbon group havinga carbon number of 1 to 20, or a silyl group substituted with ahydrocarbon group having a carbon number of 1 to 20, and adjacentsubstituents of R¹⁸, R¹⁹, R²⁰, R²¹, and R²² may form a ring togetherwith atoms bonded thereto.
 3. A metallocene compound represented by thefollowing general formula (3):

wherein M¹ represents any transition metal of Ti, Zr, and Hf; X¹ and X²represent each independently a hydrogen atom, a halogen, a hydrocarbongroup having a carbon number of 1 to 20, an oxygen- ornitrogen-containing hydrocarbon group having a carbon number of 1 to 20,an amino group substituted with a hydrocarbon group having a carbonnumber of 1 to 20, or an alkoxy group having a carbon number of 1 to 20;Q¹ represents a carbon atom, a silicon atom, or a germanium atom; R¹ andR² represent each independently a hydrogen atom or a hydrocarbon grouphaving a carbon number of 1 to 10, and may form a ring together with Q¹bonded thereto; R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, and R¹² represent eachindependently a hydrogen atom, a halogen, a hydrocarbon group having acarbon number of 1 to 20, a silicon-containing hydrocarbon group havinga carbon number of 1 to 18, which contains a silicon number of 1 to 6, ahalogen-containing hydrocarbon group having a carbon number of 1 to 20,an oxygen-containing hydrocarbon group having a carbon number of 1 to20, or a silyl group substituted with a hydrocarbon group having acarbon number of 1 to 20; Z¹ represents an oxygen atom or a sulfur atom;R²³, R²⁴, and R²⁵ represent each independently a hydrogen atom, ahalogen, a hydrocarbon group having a carbon number of 1 to 20, asilicon-containing hydrocarbon group having a carbon number of 1 to 18,which contains a silicon number of 1 to 6, a halogen-containinghydrocarbon group having a carbon number of 1 to 20, anoxygen-containing hydrocarbon group having a carbon number of 1 to 20,or a silyl group substituted with a hydrocarbon group having a carbonnumber of 1 to 20, and adjacent substituents of R²³, R²⁴, and R²⁵ mayform a ring together with carbon atoms bonded thereto.
 4. Themetallocene compound according to any one of claims 1 to 3, wherein Q¹is a silicon atom in the above general formula (1), (2), or (3).
 5. Themetallocene compound according to any one of claims 1 to 3, wherein R⁹is a hydrogen atom in the above general formula (1), (2), or (3).
 6. Themetallocene compound according to any one of claims 1 to 3, wherein M¹is zirconium or hafnium in the above general formula (1), (2), or (3).7. The metallocene compound according to any one of claims 1 to 3,wherein M′ is zirconium in the above general formula (1), (2), or (3).8. A catalyst component for olefin polymerization, comprising themetallocene compound according to any one of claims 1 to
 3. 9. Acatalyst for olefin polymerization, comprising the metallocene compoundaccording to any one of claims 1 to
 3. 10. A catalyst for olefinpolymerization, comprising the following essential components (A), (B)and (C): Component (A): the metallocene compound according to any one ofclaims 1 to 3, Component (B): a compound reacting with the metallocenecompound of the component (A) to form a cationic metallocene compound,and Component (C): a fine particle carrier.
 11. The catalyst for olefinpolymerization according to claim 10, wherein the component (B) is analuminoxane.
 12. The catalyst for olefin polymerization according toclaim 10, wherein the component (C) is silica.
 13. The catalyst forolefin polymerization according to claim 10, which further comprises thefollowing component (D): Component (D): an organoaluminum compound. 14.A method for producing an olefin-based polymer, comprising polymerizingan olefin using the catalyst for olefin polymerization according toclaim
 9. 15. The method for producing an olefin-based polymer accordingto claim 14, wherein the olefin contains at least ethylene.
 16. Themethod for producing an olefin-based polymer according to claim 15,wherein the olefin-based polymer is an ethylene-based polymer.